It looked something like slash-and-burn agriculture -- in a national park. Trees hacked, pot-holed ground, bare slopes, and hundreds of yards of black pipe, fertilizer, and a camp with propane stoves, cooking oil and food. In Copper Creek in the Bald Hills between Orick and Hoopa, last week, a Redwood National Park crew went to survey the damage from a major marijuana grow busted earlier this month.