Yeah parking there is terrible, you'll probably end up spending a good amount of time driving around trying to find a spot and when you do it'll still be a good walk. My suggestion is to go park up on Rosemont and take the blue line down there since it gets off right by the venue. Trust me, it'll save you frustration and time driving around in circles.
On another note, I'm old school, I have a lot of interest in Anthrax with Joey, a little with John, none without either.