I wouldn't trust my life to bear grylls anymore than I would a girl scout.
This is unfair to the Girl Scouts, who actually work hard to be safe and smart in the outdoors. Two of my daughters are Girl Scouts and they'll tell you to dress appropriately for the weather, wear sturdy shoes, stay in groups, stay on known trails, watch their back trail (to make sure they know what it looks like to get back to camp) and carry a whistle.
If they get lost they're trained to hug a tree and blow the whistle.
I defy you to find an episode of Bear's show as sensible as they are.