Oh my goodness, I've missed several updates somehow. So I'll have to jump in here and then go back!

for one month!!!!!!!!!!!!!!!!!!!!!!!!!!!!
It DOES pull us through!
1. Do the busses to the parks start running early enough from the resorts to get to the parks for an early ADR at Crystal Palace? think you got the answer to this already but...yes.
2. What do you when you get to MK for an early, pre-park opening ADR? Just walk in? I've never done it and am sure someone has answered...but there is a system somehow that checks that you have a ressie I believe.
3. What should I pack that I might not have already thought of? Well, not sure what you've thought of but....superglue, a sharpie, safety pins, shout wipes, travel sized sunscreen, extra chapstick. Extra hats in case one gets lost. I'm sure you have more than one pair of shoes but...same thing in case one gives you issues, first aid kit (for blisters in particular), extra ziplocs. We pack coffee as we brew it in the room and Disney coffee is well...exactly that.

I'm sure there are other things, I'll have to think!
4. What should we try not to miss in the parks? Gosh, that is SUCH an individual question. But enjoying the moment, realizing that you need to stop and enjoy it and rework plans if needed, is probably biggest for me. It changes each trip. I think for me, worrying less about what shouldn't be missed actually let me experience more. If that make sense.
5. What should I bring to the parks with me that I might not think of?
I try to travel as light as possible myself. But when I had a stroller I'd take more. Extra ziplocs, poncho's, sunscreen and blistex. While water bottles and misters are great...they can become heavy so just bear that in mind.