Hi, Amber!
Throughout 2013, it looks like the Disney Dream is sailing 3- and 4-night itineraries to the Bahamas with her new sister, the Disney Fantasy, taking the longer 7-night trek through the Caribbean. Therefore, there aren't any scheduled 5-night itineraries as of yet. I'm with you -- I love those 5-nighters for a "short cruise." Disney Cruise Line usually doesn't change the number of nights once they start booking since it sort of messes with the flow of the schedule. However, you can stay tuned to
DisneyCruise.com should something change.
Yes, you are definitely going to want to stop by the Future Bookings Desk while you're on board and see the offers they have available. They sometimes vary, but you usually can count on receiving around 10 percent off your next cruise and usually a shipboard credit, too.
I hope this helps you plan, and please let me know if I can do anything else for you as you prepare to sail. Have a wonderful day and a magical vacation. Bon voyage!
Andi