A few years ago we followed one of those coordinates (from the edit history) to try to find the tree. Got within a few meters but it didn't look like the photos and there was no redwood there much taller than the others. Still was a fun hike. The coords were just a mile or two off the paved road, but involved a bit of bushwhacking and log jumping.

Left my hat there on a branch too :( If anyone finds it, let me know, I miss that thing...