Well since I know where you are going Matt (Cocos Island - lucky you) I will recommend you take a pair of hiking boots and long trousers as they do a trip up and over a hill on the island. That was great and worth it (but very hot wet and sweaty). Be aware that there is no easy way to get onto the island - it will involve jumping off the panga into just about waist deep water.
You won't need extra towels (unless you want to take one). However much you take it will be too much.
Oh, a good idea would be to take some DVDs
You won't need extra towels (unless you want to take one). However much you take it will be too much.
Oh, a good idea would be to take some DVDs