Trawlerlover, Hoghappy and Wingrider05 can probably give you really good advice on starting a club as they have recently started clubs of their own. The first thing is to find a site where you can be visible while running. Be ready to answer questions (mostly the same ones many times). It is good that the LHS is willing to help get the word out. I would think in Florida model boating would be a easy sell.
Take a look at our club website. Our club flyer is downloadable from our home page. Feel free to plagiarize our flyer to develope one for your club. Photo copies are relatively cheap and if you can get the LHS to put them on the counter patrons who take one may remember the club when they get home.