We've only been there for regattas, but there is a public boat ramp/parking right next to Key Sailing (the store), and I would presume if you were kind enough to offer Cap'n Kirk a brewski, you might be able to keep your boat tied down there for a weekend.
That is a great place to sail. Few years back I was able to leave my H20 there while I was in town. Worked out real nice. If I needed anything his shop was right there, of course I didn't break too much. It didn't hurt that I had purchased my boat from him <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />.
You won't be disapointed in the area at all!
Clayton