Remember to move at the pace of your kids. Our first visit to WDW was summer of 1993 when my son was 6. We left our resort (Poly) around 10 each morning and headed out. By 1:00 or so, we would take a break and head back to the resort to swim for awhile. He usually caught a nap then, either on the bus or monorail. Then we'd head back to the park for the evening staying to watch the fireworks. This was pre-EMH but back when the MK was open everynight until midnight. We never made to midnight. If you want to see the rope drop then by all means try and get to the morning EMH. In the evenings, you need to stay at least an hour into EMH to start to see the less crowded lines. You didn't mention if you have the park-hopper feature. Parks with evening EMH tend to be more crowded on the EMH day. We almost never stay in one park all day. As we plan our vacation, we have an AM park and a PM park depending on EMH, parades, fireworks, where dinner is...etc. Remember to use FP. I didn't really answer your question I know. You know your kids, if they can handle getting up early every day to hit EMH and can deal with the late hours for EMH, then give it a try. My son is 20 now and he has trouble going non-stop for 8 days (so do I). Taking an afternoon swim now and then is a great way to recharge, especially for summer vacations.