Download Festival 2011 - couple of questions.?

What are the showers like? Are they individual cubicles? And are they like at normal campsites where everyones water goes through the bottom of your shower cubicle along to the main drain? Or do each shower have its own drain/plug thing? (I'm not a typical girly girl there is a more practical reason why I'm asking) and also, what's the best but cheapest dry shampoo to use? I want to take some just incase my hair gets a bit wild during the hot nights :) thankyou in advanceee!!