Unfortunately, you really do not have the truck to haul a very big camper,, as someone else said you may want to look at about the 8 foot campers
Certainly you Do not have anything big enough for a slide-out unit --and without doing some major major modifications to your three quarter ton truck, being that you have the diesel engine anyway (which creates a big load on your whole G.V.W.R. weight rating )you're very much going to be limited :E
if you want to do a real truck camper you really have no choice but to go with a 3500 dually ---
Now lot of people say oh you can hold a Big camper- with what you have --but how safe do you want to feel and how confident do you want to be when you go around the corner or you get caught in a big cross Wind. With the semi coming by?????
The choice is up to you --and I really don't think you have a big enough truck.
Yes I have hauled truck campers:W