Side to side? We once had a camp site (on asphalt) that had about a 9 inch difference. I was fortunate to see the site a couple months before we arrived and took measurements (This was a state park in Indiana). It gave me ample time to come up with LOTS of lumber.
I ended up stacking different lengths of 2x12's treated lumber on top of each other. The bottom layer being the longest, the top being the shortest. I also tapered the edges where the wheels would roll up.
I also drilled holes between each 2 boards and used metal rods to hold them in place so they would not slip. But the rods would come out so the boards could separate again.
The easiest fix for you driveway is to build a solid stack of lumber and make it a gradual ramp, until both tires are level to each each other. AND use very, very good chocks. I'm talking, a really big stack of lumber here. You might want to make the "ramp" double board wide, which give you a little more wiggle room when pulling (or backing) onto it.
Once in place, the trailer will look horribly scary. But, if the foundation is solid, the camper will be just fine. Make good foundation blocks for the stabilizer jacks and the tongue jack too. The important thing is to make it long enough it's easy to back the camper onto, and wide enough you won't slip off the edge (which would be a disaster).
That's what I would do, and yes ... I agree with you ... parking the camper in a storage lot is NOT the answer!
The other alternative, as mentioned above, is to pour a block concrete and make a concrete ramp. That would also work, and probably be much safer too.