We set the alarm for 5am UK time so that we could make an attempt at getting all of our first choice Fastpasses, including the ones deemed nearly impossible - Anna and Elsa meet and greet, and 7 Dwarfs Mine Train. We didn't get Anna and Elsa for our first MK day (it just said it was unavailable), but we got 7 Dwarfs easily, and we then went back to try for Anna and Elsa on a different day, which totally worked!
So we got ALL of our first choices, including Anna and Elsa! I'm so excited! Going to this up our pre-trip report later today!