We are just back (three hours ago) from eight days there. It took us until the last night to realize how ridiculously crowded the evening EMH is until the last hour (some nights 1:00-2:00 AM). We all (three families) missed E-Ride nights and would have happily paid our $12 each to have smaller crowds!.. We didn't realize until after Fantasmic one night that the FastPass machines are re-set to give out FPs for the late-night EMH> This can really help make it manageable. Example: go to early Fantasmic, hang out (with maaaany others) near RnRC and ToT, then FastPass either or both as soon as EMH begins.
I highly recommend the early EMH; we always zip through the park on those. Oh, one more tip: we went to MK when it opened yesterday (not EMH, 9:00 opening) after it had been open till 2:00AM for evening EMH the night before. All those sleepyheads (including us...we were there till 12:30) were not there and we had an empty park for about two hours. PM me if you have more questions about this. We worked the parks pretty well but I will warn anyone that the evening EMH thing shifted crowd patterns and our Unofficial guide strategy. We were there for over a week and never waited more than 25 mins for anything, but that was not because there were no crowds!