I fully agree about choosing the 350/3500SRW over the 250/2500 when shopping for a new truck. Also, a supercab longbed is very close to the same length as a crewcab shortbed. The difference is usually within about 4 inches, depending on model and year of truck.
Most 8' campers have small baths. Most are wet bath, with very little, if any dry storage inside the bath. Adding some of those wire shower racks for keeping things you don't mind being wet works fine. With a longbed truck, you have greater options for longer campers with bigger baths.
