PILOT/OWNER OF LODGE OPERATING DE HAVILLAND DHC2 LANDED AT 1,200 FOOT RIVER BAR STRIP AND LOADED 4 PASSENGERS AND LIGHT CARGO IN 'NO MORE THAN 10 MINUTES.' TAKEOFF ABORTED JUST PRIOR TO PLANNED TAKEOFF WHEN PILOT REPORTED LACK OF ACCELERATION WITH NORMAL ENGINE POWER. OVERRUN INTO TREES BEYOND AIRSTRIP, COLLISION WITH TREES SUBSTANTIALLY DAMAGING AIRCRAFT. PILOT NOTED 10 TO 15 KNOT TAILWIND FOLLOWING ACCIDENT.