FWIW - we did MK EMH on Friday, June 10th and it was fabulous!
There were still some crowds until about 1am but we did Splash Mountain then walked onto Jungle Cruise using a Fastpass from earlier in the day.
We headed to Tomorrowland and rode rides there until 2:30 in the morning. Walked right onto everything.
The park felt empty and it was a magical experience to be there with so few people. We spent some time with a Photopass photographer and got some fun shots of our last moments in WDW.
That is how it was Wednesday of that week as well and it was not an EMH. We stayed until close (1am) and it was not crowded at all. We had one sad experience but the CM was great.
My middle daughter got confused in getting out of the car from tomorrowland speedway and accidentally left her light stick in the car. When she realized it I sent her back to tell the CM and they searched all the cars but had missed the guy and his son that had gotten in after her. They did not turn in the light stick as found.

The Cm filled out a paper and sent my daughter to the stand to get a replacement. My daughter was in tears but thanked the CM at the ride and then the CMs that reopened the stand to help her. Disney CMs are the best.




