Never got that far south so can't give specifics, but wouldn't you do the same there that you would do on any tropical island: sail, beach, snorkel, dive, beach, bar, restaurant, local color, shopping
? After all, you aren't going to a giant city with museums and architectural wonders or to a big national park.
I assume you will be buying
a guidebook to help you plan your itinerary, pick anchorages
, etc. They usually include information on the island as well as navigation
You might also check www.noonsite.com