Leaving Soon

We leave on Sat. I don't even remember what time, but i think it is early in the morning.
Our volunteer experience has been arranged and we will be reading (or rather having children read to us) as part of a tutoring program for the summer. Thanks to Amazon and easy ordering we have a modest stack of picture books to take with us to share with the school. Some in Spanish and some in Spanish AND English. I can't think of a better way to be taught language than by children and children's stories.
I feel like i should start packing....
passport, three week supply of medicine, antibiotic - just in case, fins and snorkle mask, picture books, MY books, towels and sunscreen, clothes, of course....
Do i take my camera or do i take a cheaper digital that doesn't look so lavish....
Looking on Weather Bug it appears to be raining daily, temperatures somewhere around 80 or 90 and humidity off the charts. Do i need an umbrella or a sweat band?
I'm excited, nervous to navigate, and can't wait to meet the kids, learn some spanish, and go on some amazing excursions!