I am taking my family and parents to WDW at end of October 2005. There will be six of us in our party. I want to book an airline soon enough to ensure there will be room on the airline, but I want to make sure that I am not going to overpay. If I book tickets, and lower fares come out, am i stuck with the higher fares? If I wait for lower fares, the capacity of the airline may not be able to seat all six of us. Opinions, please.