What I'm looking at for a camper is probably a Lance 855S. It is short enough to fit on a 6 foot bed, but long enough to have the basics available (including the must have propane genset.) Dry, it is 2650 pounds, so even with 1000 pounds (full tanks), I'm well within the GVWR of a one ton vehicle.
As for towing, it won't be much, if anything. I might have a small enclosed cargo trailer for boondocking or a hitch mounted cargo rack as a way to store additional propane bottles.
The good thing is that I see a lot of 3/4 to one ton pickups where I work, so other than tucking the vehicle in the back 40, there shouldn't be any real parking issues.