THE GLIDER WAS TOWED ALOFT & AFTER MANEUVERING, THE PLT WAS UNABLE TO LOCATE THE GLIDEPORT. HE LOCATED A SUITABLE FIELD FOR LANDING BUT WAS HIGH ON FINAL APCH. WHILE TURNING TO LAND IN ANOTHER FIELD, THE LT WING TIP WHEEL COLLIDED WITH A FENCE. THE GLIDER THEN COLLIDED WITH THE GROUND & CAME TO REST.