We have an Adventurer which has a higher rear end than most diesels, but which is still too low for the compound angle at the base of our steeply sloped driveway, but just by a fraction.
We had skid wheels attached. They're neat add just a bit of protection. The weight of the coach is never off the drive wheels, as there is quite a bit of play (in our case, over 10 inches) in the rear end. It's just enough to erase concerns. Going from the street to the drive, we're on the skid wheel for about 8 inches (you can see because they leave a scuff mark in the roadway) and the other direction, only one of the skid wheels hits ground, and only about 10 inches. We've taken slo motion film of the entire path, and the rear end is raised only a few inches at any time.
My husband's an engineer and he spent considerable effort measuring the exact compound angle to be sure we'd be able to use this solution to avoid modifying the driveway. BMost of the problem comes from the compound angle created by the road dipping for about 8 feet prior to the driveway joint, and we wouldn't be able to modify that anyway.
We bought from John Bleakley in Georgia, and his entryway is slightly humped. It is very illuminating to note the deep gouges various rigs have left in his drive