Don't miss eating in the dining room. If you don't want to bring a dress or nice outfit for formal nights, then skip the formal nights, but I wouldn't suggest eating at the buffet the entire cruise.
Except for the formal nights, dress is "resort casual" the rest of the nights. The dining room experience is wonderful and not to be missed.
Enjoy your vacation.
CarnivalSensation February 2015
Carnival Dream November 2015
Carnival Fascination April 2014
Carnival Elation March 2011
Carnival Imagination Sept 2007
Carnival Sensation Dec 2006
RCI Sovereign of the Seas Sept 2006
Carnival Miracle Sept 2005
Carnival Glory Sept 2004
Carnival Fantasy Jan 2004