Sounds wonderful! I have been telling my neighbors about Grimal Grove, and they have been wanting to check it out. This might be the time! I'll let them all know about the event.
I hope someone associated with Grimal Grove will consider writing a piece on it for the local newspapers, including the Upper Keys paper (keysnet.com). They could get a lot more local support if more people knew about them - many people in the Upper Keys are into projects like these. Also, does the Garden Club of the Upper Keys know about them? If not, there might be another source of local support, and likely volunteer hours in the garden.
Someone should be sure to get this event on all the local community calendars.