It seems to me that a level coach is less important than back in the day when we first started camping. At the time (10-15 yrs ago) it was highly recommended that you use the fridge as the leveling point - both side-to-side and front-to-back. The reason was that if you sit for any period of time the ammonia mixture used for cooling would get "caught" and "pool" in one of the side s curves of the cooling coils. Of course in our case that meant that the stove was not level and cooking was a pain. It seems where-ever you chose to "level" something else will not be. I set our new Wilderness Creek to be level off the fridge just as a hold over from the old days. Unfortunately the sink doesn't drain all the way. One final pointer, if you have slideout(s) like we do, level the coach after they are deployed, it makes a difference - especially if you are a land surveyor
, or anal retentive like me. I try to level the truck first, and then the camper in it. I do use those stick on levels, one on the side above the wheel and one on the back next to the door. I prefer the ones with the graduated scale that gives you an idea of how many inches off you are. But I have also find I can get darn close just by eye as previously suggested.