I read that a lady did that on here, she just went for a wash and her mum blow dried her hair at home!!
She just made sure they had those reclining seats and moveable bowls!
One useful tip on the boobie bible, which I will defo do, is if your hair is long enough get a plat put in, like a french one, and you can leave that in for days and not worry about washing your hair lol, just dry shampoo and rub it in a bit!!