Great Harbor is home to Foxy's Tamarind, rated one of top 10 bars in the Caribbean (as was Bomba Shack on Tortola)
Beginning in December 1996, cruisers on the net started making plans to meet here for the start of the Millennium, either 1/1/2000 or 1/1/2001. Some seem inclined to split the difference: start the party in December 1999 and continue through until January 2001.
For all its popularity, there are no moorings in this bay. You'll have to anchor to stay here, though it's an easy job.