Forgot something. You will also need travel insurance. There is a sticky at the top of the page about this. You can get it in the post office or M&S really easily. It shouldn't be too expensive as presumably you are young and fit and single trip insurance should be enough. But please do take it just in case.

WARNING! - Young people go to enjoy themselves. The activities they take part in are often something we would avoid - for that reason be vigilant with the Terms & Conditions laid out in the insurance policy. There have been many tales here on HT where people found the cover they had did not cover them for the activities they were doing. One example I have read of was that only activities booked via the TO were covered.

fwh