We were just at Blizzard Beach yesterday (9/30). It did SEEM crowded but it didn't affect our day. We have 3 children 10, 8 and 5. We never did summit plummet which had the longest wait of 15-30 minutes. Everything else was virtually 5 minutes or less. The lunch place was not crowded and there were plenty of chairs everywhere. The love bugs were the worst that I had seen all week.
To get to your locals question, when we left there were charter busses lined the length of the Disney busses. They were high school charter busses ( I think I read Columbus High). I never really noticed them in the park but there must have been 10 of those busses waiting to take them back.
This is a great park and we enjoyed it thoroughly!