Thought our site would be level since it had a concrete pad but sure enough, it was off. Have a double axle camper, so I put one in front of each wheel on one side and that took care of it. Glad it didn't require more than one, since you would need to measure the distance between the wheels and build a double ramp of these things since two of them probably wouldn't fit between the wheels, and it would be too steep to drive up over a double stack.
Rating: [5 of 5 Stars!]