Anybody Ever Trailer Into The Fla. Keys?

I'm going to be starting a 6 x 12 cargo conversion pretty much for 2 to 4 day trips to the keys to go diving. The cost of diving plus motel just makes it too expensive. I'm only a 2 1/2 hour drive to Key Largo and I suppose I could come back home at night, but come on. Really? I need to spend the night down there in order to have any fun. So I got this crazy idea that I would build a stealth camper and park in the lot of the dive shop with which I am doing business. Now . . . here's what I've heard -
Key West has a strict prohibition against overnighting in anything other than a house or hotel. Big deal. I don't dig Key West all that much anyway. I'm an Islamorada, Marathon, Largo, Big Pine area kind of guy. I hear the Monroe County Sheriff's Dept tends to frown on campers anywhere but in a campground (which are all over priced because - Fla. Keys!), but I'm not sure there is a carved in stone law.
So I'm wondering - any of you ever go down into the keys? What have you heard or done or seen?
Dave Mann
Key West has a strict prohibition against overnighting in anything other than a house or hotel. Big deal. I don't dig Key West all that much anyway. I'm an Islamorada, Marathon, Largo, Big Pine area kind of guy. I hear the Monroe County Sheriff's Dept tends to frown on campers anywhere but in a campground (which are all over priced because - Fla. Keys!), but I'm not sure there is a carved in stone law.
So I'm wondering - any of you ever go down into the keys? What have you heard or done or seen?
Dave Mann