I placed another cache tonight and my new map
The cache is hidden under a neat rock that makes a perfect chair for sitting and looking at the view. It is just barely .1 away from another cache, but there isn't another rockpile on that hill further away. It is out of sight of the other cache, so it shouldn't be a problem as far as "proximity" goes.
Before I turned off the computer this afternoon, I created another Keen People map that shows the caches we found last Sunday on Palomar Mountain in the far north area of San Diego County.