We have a small but extremely dedicated group that plays frequently up in Ann Arbor, Michigan. We're actually planning to come to Fort Wayne for Dralacon in July to play Heroscape:
https://www.dralacon.com
We just hosted a tournament here, and plan on having our next one in the Fall. We also attend all the Dayton tournaments which are awesome (20 players at the last one!)
You can join our Facebook group and keep up with us that way if you're interested. Our group is called 'Michigamers Heroscape Group'.
It seems like the Midwest Heroscape scene is really gaining momentum recently. It would be awesome if you could make it to some of the events. We'd love to have you.