The park was fairly dead yesterday. I can't be sure that it's hurricane related, but i'd be surprised if it wasn't playing a decent part. I was able to ride everything in the park from 4Pm-8:30 and be in the car on the way to Ale house by 8:40.
I don't know what the other parks looked like crowd-wise though, so I won't definitively say this is due to the hurricane.