We were there on 9/29 and 9/30.
We did
HHN on 9/29, getting to the park around 4:20ish. Parking was okay and up until about 9 the crowds were manageable. We were able to get through 4 haunted houses and 2 areas without using the express pass. After 9, it got a little nuts.......but crowds were still okay, just very drunk.
On 9/30, we started at IOA. We walked on to Hulk, had a 20 min wait for Spiderman, had a 5 minute wait for Jurassic Park, a 10 min wait for Poseidon, walked onto Dueling Dragons, once on fire and once on ice. We then headed over to the studios, and crowds were a bit heavier here. 20 minute wait for ET, MIB was over 30 min, Mummy, we stood in the single rider line for 30 minutes. Then we went home.
Hope that helps!