Just check your door tag for GVWR. Best to weigh your truck full of fuel, subtracting that total from the GVWR on the sticker. The remaining figure is the the amount of weight you have to work with for a stock camper weight, plus any accessories, ie air conditioning, awnings, batteries, propane, generator, water, etc. In addition, it would be safe to assume you'll add between 600-1,000 lbs of personal gear, ready to camp. Remember, you'll want to keep all this below or at the GVWR of the truck. You'll more than likely need E rated tires, probably heavy duty shocks, like Rancho and anti-sway bars. Air bags may be needed, but I'd see how the rig sits before before ordering. Someone else may have some ideas that may be helpful outside of these thoughts. Good luck.
On edit: moderator notified to transfer this to the TC forum for better response.
RVn Full-time