THIS * 1000.
Fishing guides, jet ski/kayak/canoe rental places, restaurants/bars/night spots. There are plenty of places down there, and making it easy for visitors to create an itinerary where they may receive discounts because they're staying with you (co-oped marketing) goes a long way in making your spot look like an attractive weekend getaway.
Also, you might want to update your Web site to display all the upcoming events, local deals, things to do, etc. There's still New Year's and Winter activities listed. And perhaps a freshened up look overall... just sayin'. Not everyone thinks of looking you up on Facebook for the latest details, so having them available on the site (even if it's a Facebook feed embedded) helps.