I received the following instructions from mella and avidd:
"In Golden Gate Park you'll venture to the arboretum on JFK Drive; you'll find the statue of a sports hero. Across from the statue you'll see two roads! Which one is it? Look for the Dahlias. You'll walk down _that_ cul-de-sac road and stand under the second street light from JFK. From this street light you'll take fourteen paces across the road, toward and into the bushes. The shallow grave will be marked by a smallish rock under a bush. Your prize is sealed in a purple plastic bag, it should be easily uncovered."
covers most of what happened when I got to the park. I'm a novice when it comes to action-cam stuff, or even just taping and walking, so be forewarned of the shakiness. In looking for the bag, there was a bit of a mix-up, but we got it cleared up without too much trouble. Also note that they made the thing that was buried! A wholly excellent added touch; it's unfortunate that it's not in my size. Maybe, with mella and avidd's blessing, I can use it as the quarry for another task, so someone who this would fit can receive it?