Anyone ever think about advertising at local gun shows or historical reenactments? What about local airshows. I dont know if they would allow soliciting but, I think the crowds at these venues would actually be interested in our game.
Those types of venues would want to sell you a booth, like every other "vendor". BTW, they charge extra for things like electrical hookups, tables, chairs, etc.
Maybe having someone run around sticking flyers under windshield wipers in the parking lot would work.