Not sure what you already have planned for your non-park days but have you considered the horse drawn sleigh ride at Fort Wilderness? You can book a ride through the camp ground which is highly decorated (lots of people "winter" there and go all out on their Christmas decorations). My kiddos LOVED it!
We have waterparks in our minds and disney quest and mini-golf since we get the waterpark and more pass.
That will be really nice! I didn't know they have such a thing. We're on the budget side this time, so not sure if we will do that this trip, but I will definitely keep in mind!!

