RV review: 2026 Keystone Cougar ‘Half-Ton’ 29RLP—a few nice things, a few big deal-breakers

Today’s RV review is of the 2026 Keystone Cougar 29RLP travel trailer. This layout is common in fifth wheels, but as a travel trailer, you don’t have the steps inside as you would in a fifth wheel. So, I describe this as a flat fifth wheel. 

Oh, wait, that’s not right. The actual name of this is the Keystone Cougar Half-Ton 29RLP travel trailer. Let’s talk about towing later, but I can’t imagine towing this with a half-ton truck for a number of reasons. 

Next step: The road up

This does use Goodyear Endurance tires, which is a plus. They mention prep for the Lippert Tire Linc^® TPMS to monitor tire pressure and temperature while in transit with this aftermarket add-on. This does have anti-lock braking technology, which is a very good thing. That means there’s also a bit of sway control built into that system. 

This trailer is built with a drop frame, which means you have a very large pass-through storage compartment, and that compartment is heated, as well. In fact, Keystone is one of the only companies that can certify that their trailers are fully usable from 0°F-100°F, as they have a climate chamber to test this fact. The only other climate chamber that I know of is the one at Truma, and you have to utilize Truma appliances to be able to test in their chamber. 

Plenty of RV companies have fancy terms for being able to camp in the cold, but few can actually say that they’ve tested their RVs for that—Keystone can. 

Climate ready

Part of the Cougar’s climate readiness includes the fact that the underbelly is heated and enclosed, plus there are 12-volt heating pads on all the tanks. Another bonus, all the tanks drain to one connection. Good job, Keystone!

Keystone also uses a flooring system that is a composite laminate that the company calls HyperDeck™, which is a waterproof build that also has the benefit of being lighter than wood. 

The slide mechanisms that have been customary in these are the BAL^® Accu-Slide™. We sold a lot of Keystone products when I worked at a dealership. These were reliable, but they can get out of adjustment if you don’t keep an eye on the tension in the cables themselves.

However, here’s something that really troubles me. The fuse box is blocked when the slide is in, so if you do pop a fuse and the slide is in, good luck. Honestly, if I saw this and I were RV shopping, I would continue shopping, as this would be a deal breaker for me. 

The cabinet where the fuse box is seems to be wide enough that you could put that fuse box on the end, which would solve this problem and also not really change how these are wired. I hope Keystone reads these reviews. 

Keystone Cougar 29RLP - 2026

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Bedroom in the Keystone Cougar 29RLP

I think a lot of shoppers like the fact that the bed in this is a larger king-sized bed. Something I like about this is the fact that the closets on either side of the bed can either provide hanging storage or, by dropping in the included shelf, you have compartmented storage. 

There’s also a closet at the foot of the bed, plus there’s storage under the bed in the form of drawers, plus a storage locker. You see what I mean about the dry weight of this relative to the loaded weight—a big pass-through storage compartment in the front, plus all this storage in the bedroom, plus the fact that you’re likely going to dump the factory mattress and put in something heavier. You see how tongue weight can creep up. 

Would I lead you astray? 

Bathroom in the Keystone Cougar 29RLP

There are two things that I think most new RV shoppers do after the first night of camping: buy a new mattress and buy an Oxygenics-brand shower head. Well, lookie here. Keystone now includes an Oxygenics shower head! 

This is a decent bathroom with some drawers and a cabinet, and the shower itself is a 36” X 60” model with a Nautilus-style shower door. Unfortunately, they use a cheap 4” vent fan. Oh, well. You can change this once you realize that its only real function is to make noise. 

Main living in the Keystone Cougar 29RLP

This floor plan is exactly what you’d expect to find in a fifth wheel with opposing slides that really make for a spacious interior. 

The kitchen features an island and plenty of storage and counterspace. Unfortunately, there’s a three-burner propane cooktop with a lousy 17” RV oven. When did Cougar move to this smaller oven? They used to use the better one. Bummer. 

There is good cabinet and drawer storage in the kitchen, made better by there being additional storage behind the TV. It’s kind of like one of those secret passageways like in those old horror movies. This is a good thing. 

Well, unless Frankenstein’s monster is hiding out there. But I hear he’s been busy on the speaking circuit, so that’s not much to worry about. 

Something I like is that the dining table features two chairs and an ottoman. The table can rotate so the two chairs sit so they can see outside, and there is good window coverage. You can also get this outfitted with a traditional booth-style dinette, but the flexible dinette is so flexible. Plus, you get the ottoman. 

Boondocking and travel access

There are plenty of household power outlets prepped and ready for a 2,000-watt inverter. You can get this configured with that inverter, and there’s an even more capable solar and lithium package that comes with a 3,000-watt inverter.

Keystone has taken a strong lead on solar. I also like that they’ve back-pedaled a bit, so not all of their offerings have an upgraded solar package—the choice is yours. But it’s good that you’re given a good choice right from the factory. 

As for travel access, I mentioned that the fuse box is blocked by the slide room and so is the rest of the main living space. You can get to the bathroom and bedroom with the slides in, though. 

Let’s talk towing

I wish RV companies wouldn’t suggest towing with insufficient tow vehicles in their branding. No. You absolutely should not tow this with a half-ton pickup, no matter what the dealership tells you. 

The gross weight on this is just under 10,000 pounds, which means that the loaded tongue weight will be about 1,500 pounds. Considering that very capable half-ton trucks can carry about 1,700 pounds of cargo, that means that you can only tow this trailer if you’re all by yourself with no cargo in your ideally-configured half-ton pickup. 

Anything in the bed of the truck subtracts from the cargo carrying capacity, as do passengers, dogs, or anything else in the truck. And many weight distribution hitches weigh about 100 pounds, so don’t forget that. 

Even if your half-ton truck is capable of carrying 1,700 pounds, you’re likely overloaded when this trailer’s equipped with all the cargo in it for camping, including filling the propane tanks, batteries, and any contents in the holding tanks. 

Pulling isn’t usually the limiting factor. I can pull a railroad car, but it’s carrying that is the limiting factor. So, please, RV companies, quit telling people to tow with insufficient tow vehicles. I wouldn’t be bothered if the words “half ton” weren’t part of the name, but they are.

A good 3/4-ton truck is what you’ll need for this, okay? In fact, Keystone’s own website for this “half ton” series shows one of these trailers being pulled by a one-ton dually. Even they know the moniker is a joke. 

Final thoughts on the Keystone Cougar 29RLP

If Keystone moved the fuse box to the edge of the hutch rather than having it on the front, this would make me a happy lad and wouldn’t really change the wiring.

Oh, and on the subject of wiring. Something Keystone does that I like is that all of these are wired intentionally and consistently. This makes such a big difference if you ever have to service the electrical system. 

There is so much right with this floor plan, and I believe it’s been pretty popular. I wish all RV companies would just agree to put tire pressure monitoring systems in their towables, but at least there’s an option for that add-on. And this has anti-lock brakes, which is a big plus. 

Keystone has also done a good job with their solar packaging and a lot of other aspects of this design, including cold-weather camping. But let’s all agree that something that’s more than 33 feet long with a GVW of almost 10,000 pounds is not a trailer you’ll want to tow with a half-ton truck.

MSRP base price on the website is $57,615.

My thanks to Josh from Bish’s RV for the video and photos in this article.

More about these RV reviews

An honest look at RVs from RV industry insider Tony Barthel, where you learn the good, the bad and the intriguing about RVs, including travel trailers, fifth wheels, Class A, Class B, and Class C RVs, as well as some interesting class-breaking RVs. You can find more reviews online at StressLessCamping.com.

These RV reviews are written based on information provided by the manufacturers along with our writer’s own research. They are based on information from a single unit and may not reflect your actual experience. Shop your RV and dealership carefully before making a buying decision. They are intended only as a brief overview of the vehicle, not a comprehensive critique, which would require a thorough inspection and/or test drive.

Tony comes to RVtravel.com having worked at an RV dealership and been a lifelong RV enthusiast. He also has written the syndicated Curbside column about cars. 

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