If you're doing EMH, I presume you're staying on site. There should be a bus that goes right from your resort to MK front gate. You can certainly drive to the parking lot and go to the TTC, but not sure the monorail is up that early. If it isn't, the ferry likely would be. I like the ferry quite a bit, it's a nice ride. Just budget about 20 minutes from the time you park in the lot until you're at the front gate. You may get lucky and it's only 10 minutes, but plan on 20.