Jann, you are right that a park that has EMH can be busier overall. We have found, even during slower times, that by around lunch time things are seeming more crowded. We tend to vacation mid-Jan, early-May, or early-Dec, so I don't think that any time we have been there has it been like one of those packed July days! If things start to feel crowded, we book it to another park, and that works for us. If your strategy is to stay at one park the whole day, then maybe you want to skip the EMH featured park?! You are going at a great time (we'll be there in Jan too!), so hopefully we'll both not have to fight with too many crowds, EMH or not. I hope you have a great vacation!