I'm hoping to go to Reading, still need to find a ticket though. It's not as bad as boldie makes out (unless you're a girl, then there probably are queues for toilets). Last year I took a shower everyday and didn't have to queue. Pub in the morning for a fry up (and use their nice clean toilet) and it's all perfectly pleasant!
we used to do Reading every year, so much more civilised with the town so close. pubs didn't open for brekkie back then but we'd hit one of the department stores for a 10 item fried breakfast and a clean toilet.
the big problem if you have a shower everyday is that you then tend to notice how bad everyone else smells