Call the marinas there you might get lucky. Mat-a-mar had lots of open space the the anchorage only had 3 boats in it as of this AM.

As well protected as Mattituck is, the holding is not good at all. My #44 Rocna dragged in reverse at 5:1 scope and only 20% throttle. I had to let the anchor sit a while in the muck before setting it, and then it held. I wouldn't have confidence in it holding in a hurricane there. Luckily the shores are soft.