Man vs. Wild REAL but edited
I have had a little expereince in helping produce some of the North American shows for the discovery channel.
Bear really does go through the scenerios by himself. The camera crew has never helped him in any way (Other than unwittingly providing light during a night time run from a bear.)
The 5 day trip has obviously got to be edited down to 1 hour. So what you don't see is his hours if not days of walking to find the plants, springs, streams, trees and animals he encounters along the way.
You may even notice that some of the scenes are edited out of sequence. If Bear finds a fruit tree, a snake and a spring all in one day, the editors will edit these scenes in over the course of the hour long show.
In order to be entertaining, the editing may be out of wack but the trek is all too real for Bear.
The show is in no way "fake" or "staged"....just edited for television. And to answer the questions about what he eats and why the premise is not of an intentional camper but a lost tourist with almost no equipment having to use the most extreme measures, evidenced in the fact that even though he knows he'll need shelter he leaves his parachute behind.
Randy