i went to COC back when i was a teenager.
it gets warm, specially if your hiking a feature, so bring some light layers. (i used underarmor longsleeve)
try n wear longsleeve if your crashing a lot, glacier burns a bitch.
it can be cold so have layers you can just take off and put on.
sometimes its mad foggy.
thats all i can think of now
oh yea and sunscreen seriously youll burn faster than you think, nothin sucks more than a burn the first day of camp my buddy was so bummed