If you want an "infinitely variable" way to level with something under the wheels, look at the Andersen levelers. We used them on our previous TT and use them on our current fifth wheel (doesn't have auto-level). I also have a LevelMatePRO bluetooth leveling device that tells me how level the rig is (side-to-side) while I'm still in the truck cab and before unhitching. This makes it really easy to find the most level spot on a dirt or gravel site and then to get the trailer in the right place on the Andersen levelers. Great combo.
Rob