I installed a spare tire carrier on the rear bumper to fix the departure angle problem on the Ford chassis.
When I gas up, I try to have the unit parked with the right front lower than the rest of the vehicle. The vent pipe is located aft of the fuel fill pipe. By keeping the vent pipe higher than the fill pipe, I can fill up the tank.
I don't have any stability problems with the Ford while parked and have never had a problem finding a level spot.
11000 miles, 5600 on vacation last summer. No problems, except the stupid way the table is made. Changing mounting system this weekend.