Some but not all are locked. My son says he has no problems going.
The toilet paper bit is true tho !
I think around the 13 year Old age is prob the hardest. My son did get a little mickey taken out of him and is still called PomPom sometimes. If you can take a joke and dont bite back you will be fine. He still misses his Uk friends but is not on the Laptop as often as he used to be. He joins in the Physical Part of it more now ,and loved the camp.! All in all a good school.:)