I assume those sites are still active. There are a bunch of decommissioned Minuteman sites in the Cheyenne River Breaks, north of Wall, SD. A friend had a family cattle ranch there, where he had grown up.we used to go out there three or four times a year to ride dirt bikes, shoot, chase cattle during the fall roiudup, brand them in the spring, drink whiskey and eat red meat.
One year, my friend’s parents went in with a few other couples to buy the decomissioned launch control center for the ten silos in the immediate area. It was an interesting facility with a couple of buildings. It sat on maybe a couple of acresg surrounded by a 20 ft chain link fence. It was a seven-mile ride across a neighboring ranch.
We would ride over and hang out for an hour or two, fantasizing about whether it would be feasible to put on a motorcycle rally there, or a rock concert. The location was remote, but sat in some beautiful country.
In his youth, as the story goes, the rancher and his buddies might drive into a missile site and do donuts on the concrete pad. They had about 20 minutes before a security vehicle would come out. They never got caught, but they only tried it a couple of times before the novelty wore off, or something.