While offline, I had the chance to do some research (the old-fashioned way, without Google!) and I was reminded of Forest Park, which is a pretty expansive locale (houses the Indiana Transportation museum and facilities for volleyball, swimming, golf, etc., though no good hiking that I saw) and plays host to a number of corporate gatherings. Their website is
here. I think since we're really just a ragtag group of private individuals we wouldn't have to pay for entry; however, if we want to reserve a shelter the prices are
here for those who wish not to navigate the rest of the site.
If the vocal people represent the rest of the group, no one expects any DDR cravings, so the fact that it's in Noblesville wouldn't be a problem. In fact, to some of us <cough>Brian</cough> it'd be a downright perk.