welcome
Mike,
Welcome to Florida in advance. A key, or cay, is just another name for an island. The Florida Keys is a string of small islands linked together by a road, US 1 which starts at Key West. Residents are called Conchs (pronounced conk) and the area is referred to as the "Conch Republic". You can buy a flag there with a conch shell on it.
Tavenier is said to be named for a french pirate who sailed under Jean Laffite (sp). Another story was that a shipwrecked sailor waded ashore there and asked "is there a tavern near". I prefer to believe the first.
Tavenier is located, if my memory serves correctly, just south of Key Largo. To get prepared for the adventure you may want to rent the movie Key Largo with Bogart. Good tunes to listen to during you flight would be the A1A albumn of Jimmy Buffett.
While in that area you will want to fly down and spend a day in Key West.
If you are a diver, you will love the area. The best reef diving in the country.
On the way down, you might want to stop at Cedar Key on the west coast of Florida for lunch if your schedule accomodates that.
One word of warning. If you have not had your aircraft registered for over 6 months in another state, and have not paid the tax in your state, beware. The dept of revenue in Florida has taken the position that if you have not paid sales tax in your state and have not had your airplane registered there for at least 6 months, they can make you pay a "use" tax for using your airplane in the sunshine state. The chances of having that problem are very slim, but it does exist and you should know about it.
Enjoy your trip.