They are only open weekends now and short hours. Not sure if they have any deals. I think a lot of them expired and the next round might be just for fright fest.
Not sure how often you go, but if you go often there is a good deal on season passes now. For not much more than a single ticket ( excluding discounts) you can get the rest on 2013 and then 2014.
Dreams Unlimited Travel is committed to providing you with the very best vacation planning experience possible. Our Vacation Planners are experts and will share their honest advice to help you have a magical vacation.