Not sure how it's currently done, when I was in the department the bathrooms were broken up as such:
Inside and outside front gate bathrooms
Oktoberfest & Vortex
Rivertown Larosas, Diamondback & Brewhouse
Planet Snoopy, Picnic Grove & Family Care Center
Restrooms + Shower House
There would be some shifting, from time to time, and doubling up on areas, but for the most part, there is one attendant per bathroom plus a Supervisor in the area who checks in on them as well.
At the end of the night the bathrooms are cleaned and shutdown, the mats are pulled up and washed, replaced in the morning when they open.