Princess Cruises is also offering an end of summer promotion with savings on more than 150 cruise vacations to sunny destinations such as the Caribbean, Tahiti, Hawaii, Panama Canal and Mexico.  The Endless Summer Sale runs through September 10 and can save your family up to $1,400 on select cruises departing between November 2014 and February 2015.  In addition to special cruise fares, book a balcony stateroom or above receive an onboard credit of $200 (for cruises 11 days or longer) or $150 (seven- to 10-day cruises); and those booking interior or ocean view staterooms can get credits of $150 (cruises 11 days or longer) or $100 (seven- to 10-day cruises).