^ I would recommend going on a Sunday. If you don't ride anything you should be able to get everything done in a couple hours, that's including the shows. Although if you have to go on a Friday or Saturday I would recommend the Madame Marie Chophouse meal which includes dinner and a front of the line pass for one maze of your choice. It's $20 with a season pass, after the meal I would go and do the the mazes in the back of the park and work your way back up front, then you can use the front of the line pass for one of the mazes towards the front if the line is long.
Info for the Chophouse meal can be found at, Halloween Haunt site.