Free to look at the car show. Plan on spending the 20 buck to visit the two museums while you are there. You wont regret it. Parking is a few bucks which helps the cause. Some folks cheat it and park at the cracker barrel(not recomended) Cmon people(you know who you are),its only a few bucks.
Hope to see you there MLC Dodge.
Here is a link to his site. Just click on the 25th Anniversary Mopars with Big Daddy.