I Got the mod "Japanese Menace" which puts Mercenaries, an open base, and some turrets guarding the perimeter at the hill near the tumble weed ranch at the top left of the map. They are hostile so you need to set them to your faction.
NCRCF, along with the mod to clean it up and get rid of the buildings, is good because apart from the towers having working spotlights there is also a parking lot to the left of the main entrance which is flat and has a chain link fence that has a couple of holes in them.