The summer sale rooms are going fast. I would book what you can now; you can always change or cancel later, as long as you do so with minimum 5 day notice.I have a trip from Aug 24-Sep 1...Should I book the 24-27 portion now through orbitz and wait for the next discount period for the remaining dates? Or should I wait for the next discount period and book the full vacation together? Any advice would be appreciated!