The Private pilot and the three passengers were fatally injured and the airplane was destroyed in a collision with the ground and with trees at the end of a flight with an intended destination of Greenwood, S.C. Night visual meteorological conditions prevailed. Nearby weather reports included calm winds, visibility of 10 sm, with broken cloud conditions at 2200 feet agl and an overcast at 3400 feet agl. All major components of the aircraft were found at the accident site; a fuel odor was detected in the locations where fuel tank pieces were found. Each propeller blade displayed chordwise gouges across the leading edge and forward face. All flight control surfaces were observed at the accident site.