Wilderness survivial school/outing?

Was wondering if anyone knew of any good hands-on wilderness training outings or "schools" that are out there. I want to go on a hard-core outing where all you take is a knife (e.g. make your own shelter, build your own fire, trap your food, distill your water, you name it (Survivorman-style if you will (Bear Grylls can bite me))).