I use the bathroom door too otherwise the wife gets testy. But to level, we leveled on the table, fridge, stove, counter and floor. Then took a good average, then mounted a bullseye level in the cab. And as we POOR people do use leveling blocks and unless way out of level can say so much here and here to be reasonable 1st time. I'm finding more and more if I wiggle the coach around a bit I don't even set blocks at better than half the sights.
LEN