Keith, Menards is located in Eau Clare, Wisconsin and is owned by John Menard and his family. I've read some, shall we say "interesting" things about him. However, I believe he is a veteran and might be sympatheic to the cause. I think there is a thread somewhere in the archives here about them. They are in the upper midwest--Minnesota, Wisconsin, Illinois, Indiana, Ohio, Michigan and maybe one or two others.
I assume you have contacted Rockler? Or another thought that just popped into my head would be Cabelas or Bass Pro. The Cabelas here has events, including fund raiser type events, EVERY weekend. They don't have tons of locations, but move a lot of people through their stores on a daily basis (6 million people per year here.) And I would think their target customer would be very sympathetic to the cause.