We are thinking of something similar, if it's still offered this summer. However, we wouldn't get to MK at rope drop the next day. We probably wouldn't arrive until 10am at the earliest and not stay until close. You could see the fireworks during DAH, since you can enter early. We could spend 2 days at MK and still not do everything we wanted as many times as we wanted. Plus, I don't know if we would stay the full DAH time, which will probably be 1am in the summer, since we have an 11 year old. It kind of depends what you are doing on the other days of your trip. If you will have time to spend a full day at the other parks, do DAH, and a full day at MK, then spending that extra day at MK is a reasonable thing to do. If you have to skip another park to do the full day at MK, then I would just do the DAH at MK.