Can't answer for July, but we have been to WDW four times in June. The best advice is to get to all the parks before opening. Whether it's EMH morning or regular, you can get a lot done in the first few hours. The really big crowds don't arrive until later in the morning. I can also tell you that last June the evening EMH was a total waste of time. FAR too many people to enjoy anything. The wait times were as long or longer than during the day. Unless you grap a Fast Pass right at the start of EMH you can barely get anything done.