I'm actually VERY worried about that late akershus reservation but honestly more for my own crankiness! Jayla Is actually a trooper and could remain a perfect angel on very little sleep, I CAN'T but the princess dinner was her only request and I searched for weeks anyy opening I could find. I actually had to change days just to grab that one so I must find a way for it to work. As for m.kingdom Halloween party with the early BBB. I could deff. See that being a problem but again that was the only boutique time available so is it possible to squeeze in a nap that day?
A nap back at the resort is possible, but I would figure that the transportation time (both walking and bus) might be about 2 hours for the round-trip. So in the early afternoon, you can calculate if you have enough time to make it worthwhile.
As soon as your BBB appointment is over, I would head to Fantasyland to get Peter Pan Fast Passes and to see how long the line is for Dumbo (the line probably won't get any shorter the rest of the day). Save Monsters Inc for later. You can do it anytime with a minimal wait, and Tomorrowland is very close to Fantasyland. It's a Small World can also be done later, and when you say "storytime" do you mean Storytime with Belle? I think it has been discontinued.
If you don't get everything done in MK on this day, you have your next day there too, so that's good. And if you are able to get up early on that last day, you could hit Dumbo and a couple of other things right at park opening before going to your 11:00 ADR at the Grand Floridian.
On your Hollywood Studios day, head for Toy Story Mania immediately to see if you can get Fast Passes. They may well be gone by the time you get there, and if so, you will probably face long Standy Line waits for that attraction.
Your Animal Kingdom day is the one day that I think you could get a late start and be OK. You should be able to fit both the Lion King and Nemo shows in, as well as the afternoon parade. Check their show schedules at
http://wdwent.com/
As far as your arrival day, I think by doing the taxi and International Gateway entrance, 3 hours should be enough time.....IF the plane is on time. But if the plane is late by 45 minutes or more, then I think it will be a problem.
Sounds to me like you are well prepared and ready to be flexible (because nothing ever works out exactly the way as planned, but the more well-informed you are, the easier it is to make spur-of-the-moment decisions on the best ways to modify the "plan").