The outlet in the bathroom can NOT run a hair dryer. They provide a hair dryer in the dresser drawer as Penny said, sometimes the cord will reach to the bathroom, but we usually just end up using the mirror there where the hair dryer is. IF you must be in the bathroom, then yes you would need an extension cord AND your own dryer as the one provided is "hard wired into the drawer. Actaully, this works better because then the second person can be showering while the other is drying.....
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