Flimsy 1" frame is screwed to the floor and to one wall, the rest of the bench is stapled around. So - yes, be careful when taking it to your garage or wherever you keep your garbage :) as it will be rather shaky.
I don't think anybody in his sound mind would want it back though. Used trailer will sell without benches, put the original table back and throw in a pair of folding chairs around. Will be more space, and more flexibility. There could be an idi.ot buyer, of course - things happen.
The floor (usually) is not plywood but a particle board. When you take the screw out and then drive it back in, don't count on it holding same as before. The hole should be filled with small wood shavings or toothpics with a drop of carpenter's glue, let it cure, and then drive the screw in.
As noted, there can be LP sensor and 12V cig ligther receptacle on at least one of the benches, so you would have to relocate those onto the wall.
