should be a great time. wish i could go. i dont bring any drugs with me besides mary jane, they are really easy to get there, and less of a risk if you are not traveling with them.
ive found a camelbak is a really good thing to bring also.
besides that...id say bring cash to buy goods, and whatever food you think is necessary. I bought wayyy to much food at rothbury so we ended up having to throw alot away.