No. We used Reggie's - regtourbz.com. He was very good and we felt we got a lot more cave tubing for the money. There are several cave tubing tour operators in Belize. Reggie has been doing it for a long time.
About halfway through our float he pointed out where the ship's tour put into the river. I definitely felt like I got my money's worth.
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