http://www.windridgesolitude.org/

down in the ozarks St Louis way....they pick you up and drive you to your solitude cabin....no wifi. no tv. just nature and solitude. you just take clothes and food. you can stay as long as you want. they'll drive you back to your vehicle when you're done. hmmmmm. it's set up as a religious retreat....but communing with nature is a religion, I guess...