Many theme parks have special festivities going on during the holidays, especially during Halloween. They often open the park at night, decorate it, and I know that some parks will run their roller coasters backwards.
The only theme park I've been to that did anything like this was Six Flags Magic Mountain. I thought it was a really fun. I love it when parks do themed events.
That would be a good trip
That would be a good trip for the family, but I will have to wait a bit until the youngest is a tad older (shes only 8 months now). :)