Thanks for the input everyone. I did just come across the issue about certain things being banned or otherwise unavailable on Anguilla (watersports license and other reasons)

Doug - thanks for mentioning Billy Bones, as it looks like they do have some extras that the boys would enjoy.

The goal for the adults on the charter is to get to see some of the beaches, etc. on Anguilla, since we are spending a week and a half between Orient and Terres Basses so we will already see plenty of the local beaches. We want to make sure the boys are entertained throughout the day with a bunch of stops with different activities. Snorkeling works, but probably not enough by itself for a full day for them.