Showers and Bathrooms per Group
How many toilets or showers per camper? This is interesting. If you have a bathroom connected to a single cabin of 10 to 14 people (average sized groups), you have the worst case scenario. This group usually does everything together, so the bathroom is either needed by everyone, or used by noone. Those camps that added a single shower to “winterize” a cabin have the worst problem. Can you imagine 12 people all in line to use one shower? So two is the absolute minimum; 3 if you want to keep your facilities from getting in the way of your program. But if you have a central shower facility, either free-standing or “down the hall,” separate cabin groups are less likely to have identical schedules. It’s much more likely for an individual to find a shower or toilet available at any one time, so you need fewer total fixtures. As a result you can come much closer to the 1:10 or 1:15 ratios that often appear in camp accreditation or licensing documents. It turns out there were good financial and social-development reasons to have central shower houses.
https://www.garyforster.com/documents/Showerhouses-_Designs_and_Materials.pdf
Also, Camp Ground BathroomDesign: https://www.google.com/search?sa=X&sxsrf=ALeKk01hxq97oLdLADJEl5Zm_YLOORWeog:1623951643251&source=univ&tbm=isch&q=Campground+bathroom+design&ved=2ahUKEwip18-mm5_xAhWPZM0KHR8QDvYQjJkEegQIBxAC&biw=1728&bih=781