I have a ramp that is hinged in the middle. I modified it to my needs from a McMaster stair tread
. My intent was to use it in the big sand dunes. But I found I could always get through anything without the ramp if it was relatively flat due to my big tires, and if it was a steep hill, there was NOTHING that could get me up it aside from turning around and trying again. So, I never really used the ramp. It's mounted in front of the passenger's feet with quick-release straps.