I just plan our trip based on what works for us. I don't pay much attention to crowd calendars. One pattern I've noticed, though, (and one that the crowd calendars all seem to pick up on as well) that you might want to pay attention to, is the park with EMH is the going to attract the biggest crowdst. People always pick that park for some reason. We are early risers so we avoid the parks with evening EMH. When we do morning EMH, we usually switch parks at about 10 AM. So if you aren't taking advantage of the EMH at a particular park, pick a different one for that day.