Soft luggage as it is less likely to damage woodwork and is easier to stow.
Casual clothing. Shorts, tee shirts and bathing suits are the norm although some of the more upscale restaurants may require a collared shirt and long pants. Although the mean temperature is about 85 – 90 degrees during the day, the nights (especially in winter) can be cool so a light sweater is nice to have.
Although a bathing suit is the outfit of choice in the Virgin Islands, in town, the locals generally prefer that you cover up your suits. Tee shirts and shorts are fine but not bare bikini tops.
Hats with ties are a good idea to keep the sun off your head and your hat on your head.
Sunscreen, and plenty of it!
Hard bottom shoes can damage the boat and can be slippery on deck. Rubber soled shoes are best although you’ll probably be bare-footed most of the time. Reef shoes are nice for walking through the water or on hot sand.
While most crewed charter yachts will have an array of various sizes of snorkel gear, you should ask about unusually small (kid’s) or large sizes or consider bringing your own equipment. Also, if you have a prescription mask, be sure to bring it along. If you’re diving, the gear available onboard will be discussed during the planning phase of the charter.
A smile. If you’re out and about and need information, just ask a local. The custom here is to start a conversation with a greeting such as “Good Morning” or “Good Afternoon”. This simple courtesy is very much appreciated here.