I don't think you can go wrong. Since you are from Wisconsin you don't get to Gas City 15 times a year, so that makes it a little tougher decision. Base it on what you like. Bullring or big track. I get to Gas City a lot during the year, andam very rarely disappointed. With that being said I am going to the Indy mile, because I only get 1 chance a year. Have fun wherever you go.
Gas City will probably be a better show, but I'll be at the fairgrounds. As others have said, Its the fact that its a once a year thing and the history.
I'm excited about the potential of a full silver crown field. If there is a consi, that will make my night!
On a side note, every time I go to the fairgrounds, I secretly hope they'll announce that ol' AJ is climbing into one of those cars and gong after win number 7......
Honestly, I'm not sure I would go to the Hoosier 100 with free tickets. I have only seen 1 decent hoosier 100, so I stopped going. I'm a big fan of Gas City or Bloomington. I normally go to Gas City since it is closer to me. 2 great tracks.