My family and I will be visiting WDW early next year and it will be our first trip with the Magic Band. We will be staying 9 days and will have a 7 day ticket. Since there will be 2 days that we are not going to a park I was wondering.......If we go ahead and choose our fast passes for the 7 days that we believe we are going to the parks, how hard would it be to change if we decided to change 1 or 2 of the days?