I certainly agree that it would be better to get a 3/4 or 1 ton pick-up truck as you wouldn't have many problems if you move up to a bigger or heavier trailer.
But, my Tundra and 26'9" Winnebago (less than 6,500 lbs. loaded) works very well as a rig. I've been in the mountains and covered a lot of miles. I would agree that the Tundras advertised 10K towing capacity is misleading to to the payload capaacity. But, I do travel with a couple of folding bikes in the bed along with other gear. However, it's just the DW and me in the truck.
1/2 ton trucks can be good tow vehicles, but you are limited to smaller, lighter trailers and stay under 75-80% of the maximum towing capacity.
