We are going to transition from a TC to either a TT or 5th wheel, leaning toward a TT so we would still have use of truck bed. We've traveled around most of the western states in the TC and no problem...
Our camper has a 21’ box and we have not had a problem getting into any spot. We go to lots of state parks and some have had few spots for large campers while others have plenty. I would guess that coming from a TC, anything over 16’ or so would feel large. When we went from a 14’ box to a 23’, it seemed palatial.