Facebook groups "BVI Alive" and "BVI Abroad" often have those posts.

FYI - I expect the November/December ferry schedule to have 3 or 4 daily boats from St. Thomas. Native Son is already showing a 9am and 4:30pm departure from Charlotte Amalie to Road Town. Someone will surely have the existing 2:30 trip assigned to them. Also, the 4:30 departure may shift to 5:30pm when Daylight Savings time ends. I've also heard the capacity already increased from 65 to 100 passengers.

If you can swing the cost, Dolphin is still a better option!