The pilot reported she was attempting to takeoff from a narrow, remote, airstrip bordered by willows and brush. She said she lost directional control during the takeoff roll, and the left wing struck willows alongside the airstrip. The airplane subsequently went into the willows and brush, and received substantial damage. The pilot told an NTSB investigator the cause of the accident was '...pilot error; I didn't use enough right rudder, and the torque got me.'