Re pic #3. The rock with the pointed front I call an excited marker, meaning you are b---- y close. They always travel uphill re burial of caches. Its the only way they can install a death trap.
Next clue is the black rocks on the right. Black always means a border line not to cross over, not to go past , in this case keep to the left keep to the left or no no in general. The ancient piece of trunk of a tree further up the hill , if it is three and a quarter paces up from the excited rock there will be a cache below the arched section of the tree. The shadows of the rocks confirm here. Also never never dig down on an angle which they encouraged with "follow me" markers. Leaving you vunerable to rocks to a rock fall onto your head. Always excavate with the sky above your head. Obvious underground signs are Always decoys. They used distances and shadows and points of the compass as there real indicators.
In this case if there is an obvious marker under the arch of the branch which may mean a no no be ready to switch to 45 degrees to the right, still three and a quarter paces from the "excited rock" Again under the arch of the tree branch, your only cosher clue may be one single solitary small pointed stone and hardening of the soil when digging as a deterrent. Check with soil at least a dozen paces away and compare. Max