If you get a class C then you'll be driving that every time you want a loaf of bread and leaving your campground behind. A truck and a Travel Trailer(TT) (have no idea why you'd want a fifth wheel for one person) then you can drive the truck whenever you go for day trips.
Also check out the room in a Class C of modest size with a the same length TT. It's probably too late for RV shows but visit a big RV dealer and just wander around and look in the various types of RVs. A standard gas pickup will haul a TT of moderate size easily no need for a big truck.
Finally RV salesmen lie worse than car dealers, pick what you want and then come here for advice. Just assume every word out of the salesman's mouth is a lie, once you sign the paperwork they don't care what happens to you.