TammyJo is my sister, so I can speak for her as she doesn't get on the forums often. WE used ReggieTours, you can find them on the internet.
Many people on this forum recommend him and he didn't disappoint. Although recently someone did have a mix up that has not been resolved yet, everyone else I know that have toured through Reggie had a good experience. It is much less expensive than booking through the ship and they give you a longer tour than the ship.
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, Magic 1/14, Freedom x 2 6/14
NCL Dream October 2006, RCCL Mariner OTS June 2007, Celebrity Silhouette 2013