I completed this challenge back in 2013 - in fact I completed it in a slightly more difficult way by restricting myself to puzzles. My stats are viewable so you can check that I qualify, but I'll attach a screenshot anyway.
It was very busy again here. We stopped to allow some people pass and then quickly searched three pines - nothing. We moved back along the track a bit and then I spotted something. However I couldn't grab it as at that point two more people turned up.
When they had gone Bobcat was the first back there so this one counts as his, making the find score now 4-1.