I agree with the comments about Knoebels - it's a great park. Great food, free parking, free entrance to the park, pay as you go ride tickets.
I also like:
- Holiday World, Santa Claus, IN
- Kings Island, OH
- Cedar Point, OH
- Hersheypark, PA
- Bush Gardens, VA
I live near Six Flags Great Adventure, and we go all the time, but whenever we go, we have to lower our expectations, because we're spoiled by Disney service.