The pilot reported that prior to departing for the flight to the ranch airstrip, he called the ranch owner, who advised him to always land south at the airstrip. While en route, he checked the weather at an airport located about 23 nautical miles from the airstrip and learned that the wind was from 310 degrees at 10 knots gusting to 16 knots. Upon reaching the airstrip, the pilot looked for a windsock or other wind indicator, but did not find one. He discounted the wind information he had obtained as the airport was located over a mountain range from the airstrip and decided to land to the south on runway 18 based on the ranch owner's advice. The pilot's first approach was "too fast" and he executed a go-around. On the second approach, he touched down and "felt an immediate drift to the left." The left wing tip struck a 2-inch diameter tree at the edge of the runway. The airplane continued to the left, impacting a 4-inch diameter tree and a bank before coming to a stop. The left wing spar sustained structural damage. The pilot stated that his "decision to land to the south, in a crossing tail wind with gusts, is the biggest factor for this accident."