Butch Nelson does it. He does them around MT and below are blurbs of two of those places, although both have passed. His isn't as involved as that described in wageslave's post. I have no idea which method is more effective.

http://billingsgazette.com/lifestyl...de2a870-222f-5418-86f1-d656c04c5140.html

http://billingsgazette.com/lifestyl...0cd3590-2b23-5762-a8e1-7158033b1131.html