The first week of your trip will be busy because of Thanksgiving but the second week should be more manageable crowd-wise. Either way, I recommend that you make meal reservations for any sit-down restaurants you are interested in trying. If by the parade, you are referring to Mickey's Very Merry Christmas Party, be aware that this is a separate hard ticket event which will give you access to the park from 4pm until 12am, and it includes things other than just a special parade. We chose not to splurge on it for our one December trip, but to each his own.