I know I’m late to this thread, but my wife and I recently moved to St. Croix, so more than willing to answer any remaining or new questions.
As others have mentioned, St. Croix is open for business. Dive operators are all open and running daily trips, hotels are open, and restaurants are open both indoors and outside dining. Currently bars are closed. Masks are required at all retails stores and when entering a restaurant.
There are some new travel restrictions here for flights due to COVID. For travel from some states, a recent negative COVID test is required when entering from certain states. Other than that, daily flights from Miami and San Juan and other flights on specific days from Atlanta, Charlotte, etc. The American Miami flight is nice, especially if you can make it to Miami earlier enough in the day to make it. We’ve also stayed overnight in the hotel inside the airport just to make that flight. Flew in to afternoon before and flew out on the am. Also have connected numerous times as well in San Juan. You’ll be taking a much smaller plan to STX if you go that route, but it’s only about 45 minutes and a great view.
Let me know if you have any other questions.