Well I decided on renting a car one way. We have a family of four and it was cheaper to rent a minivan and drop it off at the AVIS company than it was to take the cruiseline shuttle (One way rental was $61 for me). We also figured we would not have to wait for the shuttle to fill up before it headed out and on the way back we plan on hitting Disney World for a couple of days so having th ecar is good there. The rental companies are close to the port and provide continuous shuttles to and from the port and the rental company.
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007, Celebrity Silhouette 2013