What time does the bath house open/close? Like, is it possible to access the showers outside of festival hours? We’re early risers and would love to get it out of the way before it gets crowded.
You’re going to have to wait in line at midnight for your number, then stand in line to use the shower in the morning. 
Actually, showers are open most all hours IIRC. Early or late, you’ll be in business!
Pretty sure the only time the bathrooms/showers are closed is when they are being cleaned in early morning hours (not sure that exact time). Other than that brief period, they do not close.