I think that previous threads have indicated that the cheerleaders are there the previous week (12/4-12/10). Many people have suggested that it is best to avoid the cheerleaders by staying at a different resort. They aren't especially noticeable in the parks, but those who have stayed at the same resort often report issues with noise and overcrowding. If you stay somewhere else, you'll hardly know they are there. We've been there the same week as the cheerleaders and found it to be a non-issue for us, since we stayed elsewhere and saw little of them in the parks.