On April 13, 2002, approximately 1530 central daylight time, a Cessna 182A airplane, N4090D, registered to and operated by a private individual was substantially damaged when it collided with trees and the ground during a VFR go-around at a private grass airstrip located near Conway, Arkansas. The private pilot sustained serious injuries and his 4 passengers were not injured. Visual meteorological conditions prevailed and a flight plan was not filed for the Title 14 Code of Federal Regulations Part 91 air drop flight. The flight originated at 1545 from the private airstrip. According to information provided in the enclosed NTSB Pilot/Operator Accident Report (NTSB Form 6120.1/2), the pilot landed long beyond his intended touchdown point. The pilot delayed his decision to initiate a go-around. The airplane struck trees at the end of the runway.