In case you forgot, it's still beautiful.

When you're getting off the ship, they have an area where they are passing out towels, selling bottles of water, and also distributing bug-repellent (lotion, not spray). Make sure to get at least two towels per person, maybe three, because there is no other place to get fresh towels on the island, and it will most likely rain at some point during the day, soaking at least one of your towels.
You can pass on the water if you bring your own bottle and fill it before leaving the ship - there are soda/water fill stations on Deck 11 of the Disney Dream (and Fantasy, Deck 9 of the Wonder/Magic). But a trick I like to use is to get ice delivered to the room the night before, let it melt a little overnight, then fill the bottle with icy water the next morning.