@Unckebob. Why bumper pull? My truck has a 10K towing capacity. The GVWR of that above posted trailer is 5K. With gear, decked system, camper shell, and that trailer attached I’m probably ~ 7000 lbs.
Granted that GVWR includes the trailer loaded down with 1200 lbs which I don’t foresee myself putting that much in it. I realize water weighs a lot and that would be something I’d fill up upon arrival in my destination area.
I’m also trying to stay away from installing air bags.
First of all, 5th wheels and goosenecks don't really play well with off-camber off-roading (I've seen numerous trucks smash the cab/bed rails...)
Second, Tundras are not really great on payload.
OP - read up on towing limits and how they're calculated. Each specific truck has its own rating for payload and Max tow rating, depending on how it's equipped. "Brochure numbers" like 10k lbs are usually irrelevant in the real world as they pertain to theoretical stripper trucks set up for bragging rights (think 2wd fleet trucks with zero options, regular cabs and long bed).
Ignore "tow rating" numbers you may have heard. In the real world, trucks have a few practical limitations:
-payload, but this is driven largely by suspension and the actual safety issues below
-axle weight ratings (see your door sticker)
-tire weight ratings (see your tire specs)
-hitch rating (see your owners manual/hitch sticker)
A 10k tow rating doesn't mean you can tow a 7k lb trailer and stick 3k lbs of crap in your truck. That's one ton territory. Your payload is probably around 1200lbs before you added the camper shell and any passengers/stuff inside. You need to subtract your expected tongue weight from that payload. At the recommended 12% of trailer GVWR, that tongue weight is already 840 lbs for a 7K lb trailer, potentially, depending on how it's loaded.
That said, a small single axle should be fine but you might find yourself upgrading tires at least and it wouldn't hurt to hit the cat scales when loaded up. No, your truck won't implode at 1lb past rating, but it does cause premature wear on axle seals/differentials/transmissions. Could result in catastrophic failure at a very bad time...