Tejaas, hope were not thread jumping here but I can share my experience in the area. Pretty simple really. From about 1977 to 1989 I worked with my sons Boy Scout Troop and we frequented El Ranch Cima a couple of times a year. When the camp was first built the tent rows were up on the rocky ridge above the Blanco river bottom due to flooding I believe. Square rock foundations held wood floors on which the tents were pitched. Things the kids dropped went thru the cracks and were out of reach. Later the tent rows were moved down to the river bottom which had softer soil and was closer to the river for swimming. When I found those old foundations I was in hog heaven. Kids went swimming and I went detecting. From the number of finds I had to be the first to hit the foundations with a detector. In the first few years I had filled an old gallon pickle jar to the top with silver, wheaties, and nickels. Lots of pins, kerchief slides, pocket knives as well. Also got to know a few local ranchers who allowed me to detect their properties which I had some good success with for relics and a few old coins, mostly around old corrals. One old rancher bent my ear to no end telling me about outlaw caches, lost mines, and Spanish treasure. I never had any time to pursue any of the stories but can still see the twinkle in his eye as he told them. I love the area and still dear hunt not far from there between Blanco and Center Point.
Don