If it were my I'd go with the CocoCay choice. Freeport is a sorry excuse for a cruise port. It has a beach, but its not very good in my opinion. We vowed never to go to Freeport again. You get off the ship, get in a taxi to be charged $12 to get dropped off in the cruiseline owned shopping area /tourist trap.
Maybe there are some excursions, but nothing good if you are beach people.
CocoCay is a private island with plenty of beach activities.
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