Was it camp San Louis Osbispo?
Nope. It was called Two Rock Ranch Station and was a base for the U.S. Army Security Agency. Top secret stuff...
...now it is a training base for the Coast Guard, and strangely enough, it is several miles from the nearest ocean. It is called USCG Tracen. (I presume "Tracen" refers to Training Center.)
Oddly enough, when I was first stationed there in 1966/67, some of us and to undergo a leadership training "class" in which we did maneuvers and stuff, and within our class was two Coast Guardsmen. Maybe those two guys were "scouting" out the place?
At the far right in the center, there is a notation for Coast Guard Exchange, which is where the base is located. This image gives a sense of how far the base is from the ocean.