Want to experience luxury on the high seas with your children in tow?   Regent Seven Seas, a family-friendly luxury cruise line, is offering 2-for-1 fares, free air, excursions and hotel packages along with additional bonus savings if you book your 2012 or 2013 cruise by December 30.  Not all sailings apply.  In addition, Windstar Cruises, a wonderful option for families with older children, gives you 15 percent off for bookings made at least 180 days before departure and you can also save up to $600/person on select Caribbean, Costa Rica and Panama Canal voyages if you book by November 15.  Other lines with excellent incentives for 2012 include Azamara, Oceania, Seabourn and Silverseas.