THE PILOT STATED THAT DURING THE TAKEOFF RUN, HE VEERED LEFT TO AVOID RUNNING OVER A BIG BUMP. THE LEFT WING THEN HIT SOME SMALL TREES CAUSING HIM TO LOSE DIRECTIONAL CONTROL AND GROUND LOOP THE AIRPLANE. THE RIGHT WING THEN STRUCK THE GROUND. THE TAKEOFF AREA WAS AN OLD ABANDONED FISH CANNERY STRIP.