With the 8' bed I have about 4' of floor space between the hitch and the cab, the trailer sits from 6-8" above the sides of the bed. I agree with Alf, the only concern about something getting in the way of the hitch is the cables. Mine are also in the bed, in the lower drivers side rear corner. A quick measurement shows 22" from the bed to the top of the sides (not including the hitch rails), you'd have room for 8' x 2' tables in my truck along side the hitch, maybe 2'6" wide too. I imagine the 6' tables would work in the 6 1/2' bed too, at least in the Ford.
Even with the tri-fold Tonneau cover you can't see the hitch, but it's not a big deal if you mark the cover and the pin box with alignment marks of some sort.