My husband and I have season passes (which if you have a family is the way to go) and we go constantly. It is the best investment we have made this year. We bought the family passes so we can bring in guests and we have had alot of fun. There is always something going on at the zoo, last year they had lions, tigers, bears, and bugs, which is where, if you came on certain weekends and had your book stamped saying you were there, then at the end of that promotion, you would get a special present.
They have the holiday magic, where they decorate the zoo in holiday lights and you can go at night, and on Thanksgiving, they had an opportunity to feed the animals inside the children's zoo. It was a lot of fun. Great, safe place for the family. You can probably spend two whole days at this zoo because it is so big. The best times to go are from september to novemeber (weather permitting) and March to June. From October to February on Tuesdays and Thursdays are free.