Nothing I know of specific to DT, but you can get Chris Parker on one of his freqs. Some options:
East Coast Cruising Nets
If you're trying to get wx while out there:
station posts wx sporadically. Ask them to update their bulletin board. They also have a VHF
wx station, tho it was out of service
when we were there last year.
You can get wx via VHF
out there with a good high mounted antenna
. Or you can even climb to the top of the fort with a handheld with the right atmospheric conditions.
Finally, we made friends with the workers on the daily ferry boat
. They would download weather
forecasts each day from Key West
and bring them out to us.