I’ve been around a few times when large groups were present and none have ruined my vacation. Some nuisances I’ve experienced included
- loud talking teenagers late at night/early in the morning in the room next door at Coronado Springs (though I spent 13 years teaching middle school, so other than the timing this wasn’t a new thing for me)
- loud chanting cheerleaders at dawn in a common area between rooms at All-Star Sports
- swimming pools full of youth football players at cheerleaders at All-Star Sports
- various large groups in line for buses at value resorts
- large groups getting in line for attractions in the parks.
This may sound unpleasant, but I’ve never experienced all of these things at the same time I’ve learned to set my expectations realistically and a few other tips. For example, the value resorts are more likely to host these large groups (though I suspect that’s less so at Art of Animation, since those “value” rooms tend to be more expensive). The groups don’t have much effect on touring the parks, unless you arrive at an attraction right after a large group has already gotten in line (or, if you’re in a queue and don’t like people chanting or cheering, though that doesn’t always happen). The biggest potential problem is getting behind a large group while using buses. In the case, if an alternate route to your destination is available, then that may help (take a bus to All-Star Music if you’re staying at All-Star Sports or take a bus to Art of Animation if you’re staying at Pop Century, for example). If not, then Disney tends to react to large queues by diverting extra buses to clear out a long line, so your wait time might not be as bad as it seems, though your comfort level may be impacted by the full load of people on the bus.