From what I have found, there is disagreement on going over recommended payloads. I was looking at a travel lite 800X camper which is a bit over 1500 pounds and based on additional equipment it is on the heavy end for a tundra or technically too heavy. You can add suspension components, but below are some stuff off the web that would be on the side of the it can be done etc.

A friend of mine has a silverado 1500 truck and tows a 4500 boat with it which he says is technically too much for his truck ..

The guy at the RV place claims that 90% of the trucks out there with campers are overloaded and he sells them that way all the time ..

Anyway, this site talks about boosting 1/2 ton trucks suspensions for campers:

http://www.trucktrend.com/how-to/towing/11...alf-ton-camper/

"After you learn that some 3/4- or 1-ton diesel trucks can cost as much an average U.S. residential condominium, smaller half-ton trucks start to look very appealing—especially if you are in the market for an in-bed camper.

The problem is unlike many of the 3/4- and 1-ton trucks on the market, most half-tons are not equipped to handle the bulkiness of a full-size camper. None of the current or even older half-ton pickups can safely haul a 1,000- to 2,000-pound payload in the bed. Fortunately, there are plenty of aftermarket companies that offer products that can help you get to your destination safely.

What we discovered is most of the products are bolt-on ready. In fact, we were able to transform a squishy 2004 Ram 1500 half-ton truck into a true camper hauler with only a few hours work in the driveway using common hand tools and some key components."

=============

campers recommended for 1/2 ton trucks, the campers here all weigh under 1,900 pounds and more than 1,500 pounds

http://www.truckcamperadventure.com/2016/0...alf-ton-trucks/

=============

Lance camper for 1/2 ton trucks weighs 1,896 pounds

https://www.lancecamper.com/truck-campers/650/

============

Adventurer camper weighs 1700 pounds or so, the article mentions Tundra here with regards to that camper:

http://www.truckcampermagazine.com/news/tc...dventurer-80rb/

"The base dry weight unit weighed in at 1,720 pounds with a center of gravity of 27.5 inches from the front wall (the front of the bed back). I have not measured every super short bed truck, but that puts the 80RB center of gravity forward of the rear axle on the Ford, Dodge, and Toyota Tundra."

============

Tundra is listed as one of the best 1/2 ton trucks

https://www.autobytel.com/trucks/car-buying...-trucks-119060/