Its good that people discuss these things, but its so important that you dont get pressured or pressure others into doing anything...health is more imortant than one night of fun, which may even turn out to be stupid and likely not memorable. I Prob sound like such a mum, but really your parents are sending you because they trust you and geniunly believe in your good judgement. Dont dissapoint. You will have fun on the beach, swimming and surfing, in clubs drinking and even if you go to the parks. You will thank yourself later i suppose, the fact that you can have a great time responsibly. And if your just dying to experiment for "the sake of it" play it safe, no hard anything, have friends around, organise transport at all times and keep contacts. Gosh i do sound like a mother.
Have fun everyone but please keep it safe.