A lot of great helps here.
I'd include a notebook to make any notes or journal ... and a camera so you can take pictures for reference and remembrance.
Dress comfortably in layers ... even down here it can get too cool when someone changes the a.c. ... or too hot. I always have more layers than I would use visiting with a friend. Ladies together seem to have different temperature needs.
If you don't drink caffeine you may want to take something just for you ... to go along with any snacks you take. Some places allow alcohol [wine] and others prohibit it ... just a fyi.
ali