Facing the mountain what is the compass direction of that site, north, east, south, west?
If that spot stands exact to a certain bearing point (any of the 4 N. S. W. E.) with supporting signs, 100% that was a burial site of YT.
No one can tell where and what spot to dig, treasures were buried in a spotted radius style scattered everywhere with accurate compass bearing from a clear surface sign. Keep in mind that every treasure load was buried with engineering plan. You need a cleaver understanding of logic of signs and markers if you don't have an experienced dowser who understands triangulation and compass code reading.
In my case i'll do first a dowsing and hunting of biggest load of the area and by that i can avoid it by using compass bearing to look for smaller loads (medium and small) several meters away with detection as a support and confirmation and after that is triangulation of available signs and markers.
Tricky but imho is accurate and foolproof. If we want success we need to do all of these.