I just towed my 84 from PA to TX. You have to put the wheels (front or rear) against the front wheel ramps of the trailer. No other position works with a Uhaul trailer. The wheel tie downs are built in and have ratchets to secure it tight (check them when you pick it up. Some prior jackrabbit cut one on the straps and then pushed the stub into the ratchet. I didn't notice until I got the trailer home). The fenders are hinged and swing down to provide plenty of room (lower them before you put the car on the trailer!). The trailer hitch has a built in trailer brake making towing a breeze with my ML63. Good luck Jed Clampet!
Just prior to load up and hopefully the last snow ever!