Space
In my posting, I said, if/when I buy another RV, it would be TT. What I would do, not what others should do.
Because I can pull a TT and get near same mileage as empty, I got 15. 5-16 towing my TT and get 12. 5 - 13. 5 towing my FW.
As for space, the FW is a given that normally, the Bed is over the FW hitch, and either you have a high roof or low ceiling over the bed.
There is more flexibility with TT on # doors, door location and all is done lower to the ground. It takes less truck to pull a TT.
As for campgrounds charging for FW, one was in AZ in '96, one was in TN in 00, one was in AL in 98, one was OK in 95. Of the four, two were KOA, one private, and the AZ was near Flagstaff, and in 02, rates at same were for # slide outs and length, no longer TT or FW. The 2 KOA sites would have also charged more for 50 AMP. @#$&! I use KOA as last resort.
Most likely, I will keep the FW I have, largely because it has a feature I can no longer find on FW -- doors on both side, enclose Bath/Shower and BR not seen from LR area. Nice clean unit, And its paid for.
Sorry for the lengthy posting.
Wayne