I have no objection to your inclusion of other artifacts, similar to what can be found within the Sups, as part of the discussion.
Personally, and partly because of finding another set of grooves at the entrance to a walled-up cave,

I believe the grooves and shallow drill holes discovered by Jim near the "mercury mine" are the result of many hours spent in sharpening iron drill bits. In that thread I suggested that one or more people may have been assigned to the location as lookouts and, since the rock was suitable for such a task, were also given the job of re-sharpening the miners tooling. As Jim pointed out in the thread, the presence of shallow drill holes adjacent to the grooves also supports this theory.
One would not test a stick for sharpness, or an arrow for straightness, by driving it into solid rock, IMO.
All of the tools which I am aware of, that the natives used for smoothing and straightening arrows, were made from palm sized stream pebbles and found in the vicinity of native campgrounds/village sites. While your photo of the grooved rock at the Pueblo La Plata ruin shows grooves as well, they are along the edges of the rock, rather on the horizontal surfaces, which suggests they were created in the process of sharpening an edged tool such as a knife,sword or iron spear point. All of these items were valued by the Apache and other tribes and widely available once the europeans arrived. Iron arrowheads were even made from discarded tin cans,etc.During the Apache Wars,for example, the army took some care not to leave anything behind which could be used in this manner.
The location of the rock,to my way of thinking,suggests a similar situation. That a lookout, posted to the top of the hill, may have relieved his boredom somewhat by sharpening his weapons while keeping watch.
I too found spirit's statement about the Chiracahua having taken refuge at one time within the Sups to be of interest. I can also see that it's entirely possible, considering their wish to remain as close to family as possible, those who remained at San Carlos. As well as being able to conduct war against the army units responsible for their confinement to the reservation.
While it may not be a subject which spirit will discuss, I have also found the stories of "Geronimo's Cave" to be of some interest. Said to contain a large quantity of gold and other treasures looted by the Apache during raids against the Spanish traders,settlements and missions, it is rumoured to be located somewhere near the Salt River. One version of the story suggests that portions of this cache have been retrieved by a group from San Carlos from time to time, and used to make communal purchases.
I suspect I have been to that cave, but have not entered it myself as yet.
spirit:
Tortilla Mountain was the first to come to mind as "dzil daho-il"
Partly because of the Ravens, and those days when they are your constant companions.
Thanks.
Regards:somehiker