I know the OP says a solution was found, but in case anyone runs across this in the future, here’s what I did in case it gives someone an idea.
Our driveway has about an 8” slope over our coach’s 262” wheelbase on the passenger side, which is about 3% and about 1-2” side to side. Back when we had a trailer, that wasn’t too bad as we just put some blocks under the low side wheels and raised the tongue sufficiently to keep it level. Having a motorhome changed things quite a bit as I now had about 8000lbs of a motorhome front end to deal with supporting.
This is what I wound up doing:
Starting at the bottom, what you’re seeing is one 16x16 1” thick rubber “Hoss Pad” and two 12x12” ones. These provide anti-skid as well as about 1” height. On top is about one and a half 2”x10”x10’ pressure treated boards. The green bits are probably not necessary any longer and were left over from the first iteration of this, just cut a 3/4” chamfer to the top ends of the boards and use some
solid rubber chocks instead. I then cut a 2” (?) hardwood closet pole I had sitting around so it would be about 3/4” shorter than the stack, drilled a hole from top to bottom about 6” in from the end of the shortest board, but not quite all the way through the bottom one (maybe 1/2”), and finish the hole with a 3/4” bit to allow it to drain. Assemble the stack, insert the closet poles in the holes which ensures the stack says together when driving up onto it, but still allow it to be easily disassembled if necessary. The only tools necessary would be a circular or miter saw, and a drill with a 2” and 3/4” Forstner bit.
The other side is exactly the same, but needed to be raised a little more so I added another 12x12” hoss pad to the top of the stack to raise it another inch.
Our tire covers are a little big and cover the top two boards, so the whole top of the stack stays pretty dry. The air underneath helps dry the lower boards a little faster after it rains. The larger surface area helps as well since our driveway was never really built with a 24000lb vehicle in mind.
The whole thing is very stable with the motorhome on top of it. Because of the pads and the way the tire backs onto the front (left) one , it doesn’t budge at all when backing onto it. Figuring out where to set it up on the driveway so I could back onto it and be right where I wanted took a few attempts, but you see the white mark to help me center the stack appropriately. Centering on side-to-side on the tire varies a little bit, so I just make sure it’s aligned with the tire and sight down the cargo door panel to ensure it’s even along the length.
The wood stack stays home since it’s very heavy and pretty big, but the rubber pads and rubber chocks (mentioned, but not shown) travel with us.
That's similar to the last iteration I tried before going to hydraulic levelers ($$$ 
). The wood system works GREAT at home (as was the OP's use case). But I just didn't have the storage room for all leveling scenarios on the road.
Linear Mode
