My thoughts are that all three will carry a camper, and that none of the three will do it right. Trucks (2x4 or 4x4) are designed to carry the weight within the bed rails and below the cab height. I have an 08 F350 SRW and I only carry a 2500 lb. Alpenlite. Did it do the job stock? of course, but I wasn't happy with body roll on roads with potholes that allowed the camper sway to take over. Solution? stiffer coils in the front, air bags and torklift suspension on the overloads in the back and Bilsteins all around.
Much better. It could still use heavier sway bars, but I am happy with it now. The lesson is drive it if your ok with it and its within the legal limits, and modify it if you are not happy with it, or you need a little more ooooomph if its overloaded. No matter what you do, remember to drive it like it has a couple of tons of burden above the bedrails and slow the hell down. It isn't a Ferrari you are driving.......
