Your input is worth a lot, Larry. As I posted in this thread in January, we were taught slides out first and in last; that apparently has been Beaver and Monaco's philosophy over many years of coach production, but not all owners of used coaches are aware of it. You proffer a good reason for following the routine.
The only time we may break rank with the principle is in the middle of the night during a winter gale on the coast, when a slide or two is brought in to limit topper exposure and damage risk. I don't usually stop to air to ride height first, esp. if I have to start the engine during quiet time to get pressure because it was low for some reason. But that is a very rare occurence.
Joel