I need to tie down my LT in a Budget rental truck, and move my daughter 700 miles, all interstate hwy. I believe the truck has rings on the walls, not the floor, so that is my dillemma, how to secure it to the walls, not the floor? There will also be a lot of furniture, etc in the truck, but the bike is the most important issue. Any ideas? The truck has a 16' box and a ramp, and I'm not sure of the spacing of the rings, won't know until I get there.