Columbia, Missouri. They host the show-me games, the largest summer games in the nation for amateurs. They have the city infastructure to host the type of event you need in the midwest as well as plenty of hotels and night life your looking for, in a decent sized, easy to find location. Plus all the media outlets you need.
AA Factory- If you don't know what it means, don't ask.
"No Day but today"
Dynasty Fan Club #211