WRVPO Quote: "Actually, I get no more customers. My old restrooms had very high ratings, but they were dated. We sell out every day in the season."
I think my point is, keep he facilities maintained, you keep customers, let it run down and you'll eventually lose customers. So, the fact that you stay full means you continue upkeep, at least it's a factor.
And regardless of how anyone utilizes the "cost factors", I'd bet you'd rather keep full at a lower rate than have empty sites at a higher rate. Doesn't take many empty sites to drop the revenue below a profit margin, as the overhead stays the same no matter how many sites are full or empty (of course, full sites W/E change it a little, but not a lot).
At $30 per night rate at a $5 margin, if you have one empty site, it takes six full sites to break even for that one empty site. SO keeping sites full is better than raising rates and losing customers, although I'm 'guessing' at the margin here.