Well if you are that close, land in Lauderdale and then drive an hour to Key Largo. Best dive spot in the US. I myself like the shop "It’s A Dive" in Key Largo, It is in the Mariotte ( not sure) hotel and they do all the water sports for the hotel. If you are going to Key largo, its better to land in Miami than Ft Laudersale. You can also drive the hour and a half to Key West if you are in Key Largo. THATS A FUN PLACE!!! Have a nice time