The fridge is s bit more forgiving than often mentioned here, give it 5 degrees near plumb and it is happy. I found a location that was level, made sure the bumper and frame were level then attached stick on levels. When we set up at a campsite if it is not concrete, paver, or other hard surface I usually set the slide out side a half bubble high using planks. This assures me of being near level when extended. Even if it does not change position the doors inside don't walk open or closed at this setting. We have been in the position of everything seeming to be level and by the second day the slide side was low and doors were in the way or closed.
