The guy on the plane sitting next to me gave me this tip.

Ho Chunk casino in Wittenberg will give $50 in free play if you bring in your boarding stub within 7 days of your flight. I didn't know this and it is not listed on their web site. Ho Chunk only has electronic blackjack tables and you will need a players card to get the free play, but for me it was a good deal since I drive right past the casino on my way home. Also since I never had a Ho Chunk card I got another $10 for signing up.