If you get stuck with approaching darkness Haulover Bay on the east side of Cistern Point is a reasonable, if not optimal alternate.

The problem with Manchaneel Bay is that as the land cools the trade winds drop down and funnel through the gap at Haulover/Trash Beach. It is partially blocked by Cistern Point. This creates a train of vortices that roll over the mooring field. At any one time every boat in the field will be pointing in a different direction.

Boats at anchor in the seemingly ideal spot in the gap between the point and shore will spin in place. Bahama moored on all chain 5/1 scope between a 50 lb CQR and a 40 lb Bruce we did at least 12 complete 360s between 9PM and 3AM when the CQR finaly broke out. A wind powered Spanish windlass.