For our trip next month, I had a lengthy conversation with AA about the requirements at STT since their website info was unclear to both me and the AA person. My understanding from this was that you need to checkin online at least three hours before departure. Then you need to check your bag and/or get your boarding pass 90 minutes before departure. I should have pursued clarification about requirements if you have a digital boarding pass and no bag to check. Assuming RTFF is running at noon (which I plan to confirm with them), I plan to checkin online from Tortola and take the noon ferry.