This idea makes sense.
I carry a floor jack like that in my truck because it's the only thing that can lift my truck high enough to actually do anything.
But my biggest complaint is the tiny little metal wheels in the dirt/gravel.
I might try this this spring and run it this summer and see what I think.
Some changes I might make; One would be to drill holes near the corners to be able to drive large steel tent stakes into the ground through. That way if you have a sketchy/slippery situation, you can help anchor it down. And two, I think I'd put a 1/2" thick plastic plate under it as well to assist in sliding and also grabbing rocks/gravel under pressure.
