I have a custom Phoenix popup camper built for the Canadian winter with 2" insulated walls, insulated cabinets for gen. set and 2 20lb propane tanks, lots of extra gear like tire chains, extra skis and clothing, shovels, tow chain, etc. and enough gear for a 3 to 4 week trip. It probably weighs 3300 lbs. wet.
Truck and camper wet weight with me and the dog on board is 8800lbs. This exceeds the GVWR of my 91 Dodge diesel 3/4 ton by 300lbs. but does not exceed axle load rating or E load rated tires.
Because of the very heavy Cummins engine the front axle weight is heavier than the rear. I have a Kelderman air bag suspension which includes front axle air bags.:B
The truck handles great, stopping distances are good.