We have some friends near Reno who have a slide-in camper in a Ram 3500 dually. A full fresh water tank makes the camper exceed the truck's payload limit. It makes one wonder who did the engineering for the camper. Dodge sells a Ram 4500, but it's just a chassis. My truck with two bikes, two people, and a generator is still less than the payload limit when the Jayco is on the ball.