Dry camping in race track grass field
We never lift the rear off the ground for the same safety reason others have mentioned. We don't like lifting the front either, but that's mostly for stability reasons.
We carry 4 packs of Lynx leveling blocks which we stack like Lego and use under the wheels whenever we're in a non-level site. You can get them at Walmart and they work great. We've used ours on our 40-foot MH for 4 years fulltiming (with a lot of dry camping) and they are still in working condition. We also use wooden blocks under the jacks. The extra advantage of all these is that they help prevent sinkage.
12 paws, 40 feet and the open road