How different do you suppose the “ride” is between in a secured crate in a TT near the hitch and in a secured crate in the bed of a PU in terms of noise (rattling, squeaks, etc) and the bouncing/jarring? Most people seem to think dogs experience the same “ride” on the floor of a vehicle as we do sitting on the seats.
If you don’t know, crates make noise while traveling when inside the cab of a vehicle, in the bed of a PU, in a motor home, or in a trailer. Since we have a van with 7 crates right now (and as many as 9 in the past) know from personal experience. There’s a lot of noise while traveling on gravel roads.
Btw, items left on the table and counters of our Nash, stay there unless I need to brake very hard.