ok, it sounds silly but it's the one thing i wish i brought a new tube of before i left. i hardly ever use it home because it's such a pain to get off, but had it in my bag and wished i had a fresh tube. leave the non waterproof home, it will only end up under your eyes, not on your lashes. with all the water activiies i was glad to have the little i had left with me.
oh and whoever suggested the snap hooks, they were a great tip! i recommend them to everyone.