This is just me, but any day I planned to spend any part of the day at MK, I'd make my FPs for MK and keep them there. Even if you decide to do AK instead of a water park that day, if there's any chance you'll go to MK by the end of that day, get and keep your FPs at MK. AK has to be a LOT easier to do without FPs than the Madhouse that is MK.