You may already know this but just pay attention to the
resort monorail start times for the day you're trying to do this. Sometimes it's running early enough for EMM and sometimes not. For example, if you look at this week, there is a Tuesday EMM but the resort monorail does not start running until 8:30 AM. Some of the EMMs have been on Sundays and the resort monorail hours have been tending to start at 7AM or 7:30 AM lately on Sundays. Monorail hours change all the time so make sure to double check the Times Guide when you are on site for the latest. This is a helpful link to bookmark too:
http://www.orlandoparksnews.com/p/weekly-walt-disney-world-times-guides.html
Sorry if you already know the above, just making sure you've accounted for everything. We loved EMM when we did it in July BTW, LOVED it. We were staying at Poly and went on a Sunday, the monorail was running at either 7 or 7:30AM (can't quite remember) so it got us there just fine. If we had gone to the Tuesday one that same week we would have had to figure out alternative transportation.