Mineral (reef safe) Sunscreen-It’s the Law in the U.S. Virgin Islands! To protect yourself, our coral and marine life, please use only non-nano mineral sunscreen containing zinc oxide and titanium dioxide. Water Shoes- Some beaches in the area can be rocky! Bug Spray- there are Island bugs everywhere!
You do not need a passport for Saint Thomas, or any of the US Virgin Islands, which are all a short Ferry Ride from St. Thomas if you want to adventure.
It is recommended to bring your birth certificate, though it is not necessary.