Going to the Galapagos! Any tips?

Hi all,

I assume this will likely be the only time I ever go, and so I'm curious if anybody has any suggestions -- either must-have gear, shooting tips, or whatever.

We leave late February. I have an NEX5 now, and I'm hoping to have an NEX7 by then (fingers remain crossed). Lens-wise, I'll bring the Sony 18-200, 24Z, and 16mm (I see no reason to also have the 18-55). I expect to use the 18-200 most of the time.

I also have a Gorillapod w/ a ballhead (though I don't especially love it). I'll also bring my little remote.

Anyhow, just wondering if there are any obvious things I should get/bring -- or any shooting tips particular to this sort of setting.

Should be fun!