Years ago I made a set of pads from 3/4" treated plywood. They're 12" x 12" pieces screwed and glued together for a total thickness if 1 1/2". I drilled a hole in each one about 2" from the edge and inserted a poly rope with a loop. They can be pulled from under the motorhome without having to get down on your hands and knees.
We use them all the time on anything but a concrete surface. They even get used on asphalt. In some areas the asphalt gets so hot the jacks sink in without a larger base to support them.
We also make sure to use them on any surface in the late fall and early spring. Before using them we had a couple incidences when the thawing and freezing water froze the jacks to the ground. We had to crawl under and pour hot water on the feet to get the jacks to retract. When using the wood pads we can raise the jacks then drive away. The wood pads can then be easily removed.