I have a HF chock bolted to an aluminum frame I had made that is secured to the floor by cutting slots in the aluminum channel and cinch pins. I took a section of 6x6 lumber, cut it not so thick and put under the frame. I have fork tie downs on the HD Ultra Classic Limited and pull the bike down with ratchet straps so the frame of the bike is firmly on the wood block. Rear tie downs too. If the suspension is left loose, bumps could loosen or lose a tie down and the free standing bike go flailing around. I sometimes carry a second bike, Fatboy, and absolutely do not want any sideward movement. The second chock is bolted to a piece of plywood and slides under the aluminum frame. Tie downs prevent any movement.
Sorry I don't have pictures now but believe I did post some of the setup about 3 years ago.