It's like going to a carshow in Hell. I swear that it's always the hottest, most humid week of the year. It's like they gave all the nice weekends to the Chevy and Ford guys and asked them, which week of the year they would never come, and the organizers said, ok...we'll give that week to the Mopar guys.
Lots of stuff to see there. It takes most of the day to get through it, and that's if you're just looking. If you're shopping for anything and taking your time, you can spend 2 days there.
There's usually an indoor carshow at the York Fairgrounds at the same time.