HERCO owns Williams Grove? I probably sound clueless, but when did that happen?
I agree with Dutchman, I really don't see any big changes at Dutch Wonderland coming as a result of this. The park is definitely a niche park, its pretty close to Hershey and caters to a completely different audience. If Dutch Wonderland started adding thrill rides, it would damage their family image as well as dillute Hershey's crowds.
As for Williams Grove, isn't that rather close to Knoebels? I don't really see how they will be able to compete with them, unless they make some drastic changes.