Hi Alan,
I don't have any experience here, but
this came through the Madison Insight Meditation Group's email list a month or two back. I only really took note of it because it seems to be pretty close to where I'm located. Looks like they have a Theravada background and offer "DIY" style retreats. Could be worth looking into?
http://liberationpark.org/
Anyone had any experience there? I'd love to have an opinion or two as well.
Best,
Eric