I like your four parks plan! I think you are right: you can use the transport between the parks as a period of rest! Also remember that at the MK, you can avoid walking by using the Railroad!
Love your asics, they are much cuter than mine, but then mine are mainly for running, so I don't really care that much what they look like...
I know what you mean about large feet. I usually wear a 10 and already find shoes difficult...
It also seems that the weather forecast has improved a lot for your trip, hasn't it? I spot 76 for next Saturday. I guess buying long underwear really helped!!

But who knows what the weather will really be up to and at least you know that you will be prepared for everything. I just feel so sorry for the people running the half marathon today with a high of 42!!

And I was planning on doing that next year... I might need to reconsider...