DJ has exactly the right rig for 4 wheeling.
A dually is going to be too wide for some trails. A SRW is better.
A regular cab or extended cab SHORT bed is a better choice than a crew cab long bed. A shorter wheel base is less likely to get high centered, and is easier to turn around when you hit a dead end.
Lastly, a pop-up will have a lower center of gravity and will rock and sway less as well as provide better overhead clearance.
And stay with a light weight camper. There is absolutely nothing worse than pounding down a bad road with a seriously overloaded truck.
This isn't just arm chair advice. We've been wheeling campers for 10 years and learning the hard way by doing it wrong with long, tall, overweight rigs.
Post pics when you get set up. Have fun.
