The private pilot was landing a tundra tire equipped airplane in an open, grass covered meadow to pick up a deer that he had shot earlier in the day. He stated that while on approach, the airplane touched down about 10 feet short of his intended touchdown point. He stated that during touchdown, the right main landing gear struck a large rock that was covered by tall grass, and the right main landing gear collapsed. The right wing struck the ground, and sustained substantial damage. The pilot noted that there were no preaccident mechanical anomalies with the airplane.