Use camper stack-able leveling blocks such as https://www.tahoeyukonforum.com/thr...r-leveling-tahoe-for-camping-sleeping.120693/ They are light, store easily, and a lot easier to use than the Anderson levelers which are designed for trailers (only side to side leveling, not front to back leveling). Place a torpedo bubble level on the sleeping surface to see how out of level you are; experience will tell you how many blocks you need to level up based on the bubble level. Place the blocks in a ramp on multiple wheels as need and simply drive up. Truck bed campers do it all the time.