You can do a decent job with three stepped leveling ramps. Often rustic campsites slope downwards to a creek, lake or ??? and they may have side to side out of level. Three stepped ramps placed under the front wheels and one on the low side in back will get you level. It might take 2-3 tries backing up with more or less under the wheel when you start to get it reasonably level.
Dometic says 6 degrees fore and aft and 3 degrees side to side tolerance for their absorption fridges. I can easily get under a degree with stepped ramp levelers.
They will cost less than $100.
David
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