Mr. Tom,
Well, you know the procedure already with the 5th wheel and your ability to manage it. A few years ago I watched an older couple trying to level their 5th wheel on boards. It took forever.
They didn't need to be doing that. During the process, the 5th wheel fell on the bed of the truck. I felt sorry for them. I would think they were into the mid to late 70's.
So, what I'm saying is, a class C or A is easier and faster to set up at the campsite. Just hit a button and you are level and you can use the camper at rest stops without leaving the vehicle.
Keep what you have since you are young then move into a class C or A when you are older.
Good luck,
MM.