We booked our trip yesterday to WDW for Nov 3-9. Maybe I'm just second guessing myself because I've wanted to go forever, but I can't help but think that maybe the first part of December might be a better time to go if crowds will be lower. Will this make a big difference? Is it possible to even change the reservation without a fee? We would really like to go when the crowds are lower and our schedule is flexible so I want to pick the best time.