Watch this video, and do what he does.
Every time I reloaded into the world after quitting, it was there.
- (others have noted not having the same success rate probably due to others doing the same thing or it was previously taken in that server you have joined)
Took 20 mins just because of the loading times.
Also, I did not move my camp (saving caps for other achievement). I just used the fast travel spawn location with a custom marker and ran there every time.