[Kn1nJa]

Maybe it might be a bit much, but with the price of chips going way down you almost might want to consider 32GB or more. I'm a huge fan of redundancy, so I love making sure I have spare parts for as many things as possible. What I would do in this situation would be to take a few photos (like several of one child on a ride or something) then swap out the chip so that you don't "put all your eggs in one basket". Everyone's good buddy murphy probably hangs out at Disney too, so it never hurts to be prepared.

Thats just my two cents. I'd rather spend a little extra on more memory now than risk having something go wrong, or miss a shot due to no more space.

Hope your trip goes awesome!