I am in the process of purchasing a single cab 1993 Dodge Ram 250 long bed 4WD 5.9 Cummins with a stick. Included in the purchase will be a nice utility bed that came off a 1985 Ram single wheel crew cab long bed I sold the guy I am getting this truck from. The ole 5.9 mechanical Cummins engines are reliable, simple, easy to fix anywhere there is a diesel mechanic and get good fuel mileage
My thoughts are to remove the factory PU bed, install the utility bed, make a rack that extends over the utility bed and the cab, install a basket over the front overhead rack area for spare tire and other items you normally do not need easy access to, install a roof top tent, use the rest of the rack for above storage of kayaks for whatever else, cover over the open area of the utility bed up the sides to the bottom of the rack, install a slider rack on the floor for water storage and other items. Use the rack side plates for mounting of other items as needed. Use the doors in the utility box for the kitchen. Install a 270 degree awning on the rack for easy deployment, battery system in the utility box with solar along with water heater, water storage tank along with tools and other items.
The older I get the more I am about small. Ya I know a long bed single cab truck isn't exactly small but for me it is a downsize over the crew cab trucks and old 23 foot GMC motorhome we still have.
I think it would be a good, reliable and simple camper setup to go offroad as needed or desired.
The good point of a single cab truck is it makes you THINK about what is really important to have on a trip and what is nice to have on a trip. In most instances what is important and what is nice are not the same!