8 sailings in Feb 2011 all on Disney Dream, starting prices below for 2 ad & 2 ch, they include Insurance and transfers so that will bring price down if you don't want them.
Personally I would not do a 3 night cruise, 1st day you don't board until afternoon, last day you get off 8-9am so really its a 2.5 day cruise. 4 days is our minimum.
Never been in Feb, maybe check temps this year to give you an idea.
$2,506 Sails Feb. 3, 2011
3-Night Bahamian Cruise
$2,436 Sails Feb. 6, 2011
4-Night Bahamian Cruise
$1,821 Sails Feb. 10, 2011
3-Night Bahamian Cruise
$2,211 Sails Feb. 13, 2011
4-Night Bahamian Cruise
$1,781 Sails Feb. 17, 2011
3-Night Bahamian Cruise
$2,126 Sails Feb. 20, 2011
4-Night Bahamian Cruise
$1,711 Sails Feb. 24, 2011
3-Night Bahamian Cruise
$2,041 Sails Feb. 27, 2011
4-Night Bahamian Cruise