You can rent a car. In Florida you can rent a car at one location and drop it off at another location for free. I see there is a National rental car counter at SFB there is also a National rental car location at either the Dolphin or Swan hotel. So you can pick it up at SFB and return it to either the Dolphon or Swan. Then take one of the resort buses to back to your WDW resort.
This also gives you the ability to stop at a grocery store to pick up a few items. Also since you will have the car for 24 hours, the first night you can eat off sight and save money verses eating on sight.
Just think the amount of money you save buy eating off sight just one night will help defer the cost of the rental car!
