I'm assuming you've already contacted vacatation planning for the snacks. Since it'll be the first time for the rest of your family, request 1st time buttons, balloons, and autographed photos for them. We did the snack thing too when we stayed at GCH. My kids didn't mind leaving the parks at night to go back to the hotel since they couldn't wait to see what Mickey and his friends left for them.
mmmm... chocoalte covered strawberries. Who would have thought my kids wouldn't like them? All the more for mom though.
If you plan on doing Build a Bear, there's also an early entry for GCH guests. Book as soon as possible when you check in, it does fill up during the busy season. There's a $10 minimum purchase per person but you also get a bonus. When we went, the bonus was a BAB sling backpack.