Once you leave the highly competitive Virgin Islands $30 per night for a transient mooring would be at the market or far below. $125 per night is getting more and more common. Enjoy the $30 and anchoring while you can. I expect those number to only go up and even way up. In my opinion I would add many more moorings and disperse them as part of a sustainability effort included in the cruising permits. The key is spreading the boats out and eliminating boats from some of the most sensitive spots.