Activities ashore are part of a yacht charter.
You'll generally overnight on board your boat out in the anchorage rather than tied to a dock because it's quieter, cooler and usually, bug-free. This doesn't prevent you from going ashore any time that you want to, as the yacht has a motorized dinghy and a crew that's always available. If you'd like to do an island tour they will help you arrange it and go with you if you'd like. You'll be visiting several different islands during your cruise. Shopping St Thomas is renowned as a Shopper's Paradise.