[Fulltiming]

I put it in level mode and if it is still out of level, I manually level it. You can adjust the point that the HWH system thinks is level by adjusting the three screws holding the leveling sensor hanging from the top on one of your bays near the center of the coach until level on the HWH matches with your 4' level. While your slides should be put out and retracted while the coach is in Travel Mode, there is no  benefit to not putting it in LEVEL mode to level the coach. After the coach is level. Shut down the engine and turn the leveling off again so it doesn't try to auto-level every half hour or so.

I use several 24"x24" outdoor plywood 3/4" thick under the front tires of my coach at home because the driveway slope exceeds the travel available to the HWH system.