We're taking the opposite strategy from some of you and booking more ADRs than usual. We arrive the afternoon of the last day of EEMH, so we have no idea what park hours will be during our trip. I think they'll extend them, but we don't know at which parks and at what time. For our MK and HS days, I have an extra ADR booked each day. Once they let us know if we need our "9 am open" plan or our "EEMH plan," we'll let the ones we won't use go. We've never planned a trip this far out before--our first 2 were planned at 3 and 4 months in advance. Planning meals 6 months in advance when there's a likelihood of major hour changes is tough!
I think which park we'll do which day is more set in stone than other people's at this point, but it's because of some of the specifics of this trip. If we were doing our usual 5 full park days between Sunday and Thursday/Friday, we'd have a lot more likelihood of changing days based on hours. Our trip is super short (Saturday afternoon to Tuesday morning) and we're not willing to devote a huge chunk of a day to GE lines. We're taking the position that if we see GE this trip it's a bonus, and if we don't we'll catch it in a few years. There are certain parks we do or don't want to spend a full day at, and we plan to avoid HS and Epcot on the weekend. Our best chance for low crowds and being able to take advantage of any early hours they offer is to put HS on our last day, Tuesday. We're crossing our fingers for EEMH at HS, which might make seeing GE possible, but if not we'll focus on the rest of the park. I have Sci Fi booked as soon as they open that day. If we're there from 6 or 7 am we'll be ready for lunch before we leave, and if it's an 8 or 9 am day we'll probably grab a snack at HS and have a late lunch at the airport.