Someone else on another board who works at CP said that the crowd is bigger on a Monday than a Sunday. Must be the church thing or something.
The first 2 weeks of August are very tuff because it's still summer time. You'll notice on the calendar that the park stays open until 10pm.
It is the last week of August where the crowds will die off. The closing hour is 8pm for this week.
School in South Florida starts on August 27th. It's very weird how they do this. Start school, then have the next Monday off, but that's how it's always done.
If you could move your trip to the weekend of August 27th, the place will be empty, it's the first day of school.