The posted coordinates will take you to the Outpost campsite. Originally, there was a building at this location with a number on it, but sometime in 2023, park staff removed the building. So now, you'll have to find the rotting tree/stump next to where the building was located. There you will find a small container with the magic number. Take this number and do some basic math to solve for the final.
North: 40° 10. (213 + xxx)
West: 074° 18.(795 - xxx)
The final location will take you to a hidden spot in the park.