Badger,
Sounds like you have things well in hand. If you choose to take slower rides along the gulf, then Naples Cyclery is the place to reserve a couple of bikes. They will also set you up with the appropriate maps to get you where you want to go and back. From their store you can ride through some beautiful areas of Naples including Port Royal (called Millionaire's Row, although these days more appropriately called Billionaire's Row).
Steve