Not Peralta,
No, I don't see the map in your Heart pic. But, like I said, the resolution isn't that great. I couldn't even see the heart until I viewed it in fullscreen mode. From the looks of it, it appears to be an actual picture, not a digital pic. If so, maybe you can scan it in a higher resolution and post it to your FB Group once you get that up and running. Also, maybe you can mark up the pic to make it easier to see what you are talking about. As it is right now, I can see what appear to trails and such... and if I use my imagination, I can see a map of just about anything in it.
BTW, I understand you wanting to keep the location secret, but I was just wondering if you could narrow it down a little... like is this still in Arizona, and what basic region. I could be wrong, but I doubt that heart would show up via Google Earth, which would be the only way I would be looking for it any time soon (soon, as in years).
Also, I realized that I never answered one of your questions. No, I haven't spent much time hiking the Superstitions, just once actually. I did live in Tucson for a year, 21 years ago, and did a lot hiking, and some camping, around that area, but that was long before I ever heard of the Peralta Stones. But, unlike a lot of people, I do understand how hard it is to hike in most of AZ. You can look up an easily see a trail that you want to follow, but with all the loose shale, you have to watch every single step you take. So you take about 10 steps, watching every step you take, then look up to see if you are still on the trail, then repeat, repeat, repeat.

It's not like hiking in some nice wooded area with ground that isn't going to give away from under you with any misstep.
No prob about the FB help. I'm an IT guy by profession, until a permanent case of vertigo rendered me unable to work 6 years ago. So helping people with computer issues is 2nd nature for me.
PBFred