I have one of those suspension training systems (i.e. TRX, Rip60) and it works great IF I have a tree with limbs near by. I'd like to have a way to mount this (and a pullup bar) to the RV.
My original thought was with the ladder. However, after inspection the ladder doesn't really seem to be mounted very stout.
How about something that would attach to the rear bumper? If you use a 4" receiver and 4" stock, you should be able to weld something together that would work.