We do not currently own a MH, but are in the market. We have rented class C's in the past from Cruise America. When we rented, they would tell us to try and park as level as possible, or the fridge mi...
In my one year worth of experience I have been surprised to realize that a small amount off-level is noticeable and bothersome aside from the fridge issue. Like most others I seldom need to use the leveling blocks but am very glad to have them when they are needed.