What's the shuttle schedule like?
Booking excursions on the main island right now and it seems some come back around 4-5pm. St Regis website here:
https://www.marriott.com/en-gb/hotel...a-bora-resort/ states that they depart from the main island at 1:30pm or 4:45pm after that the next shuttle is at 9:30pm. Are shuttles really that uncommon between St Regis and the main island?