Here's a pic;
The marina in question is #12 on this chart. The dock that I would use is the first one in (most southerly) shown on the chart. The bay opens up outside of GC "5", and RN "6" to about 1.5 miles to the west, and 5 miles across to the south. For scale, the entrance to this cove is 200' wide.
Interesting that the marina to the north (the un-numbered green arrow) also has available slips, and they would be about $400 less for the season.
Thanks in advance!