It looked to me that the berms directly behind the mounds, outside the fenced enclosure, contained missiles(three yellow triangles on thumbnail). Is this likely?
The missiles would have been in the six revetments arranged in a circle. The ones outside the site might contain command and control vehicles. SA-2 usually have six launchers, arranged in a rough circle, around a centrally located missile control radar, either a Fan Song or Tiger Song. Nearby one usually finds a Spoon Rest early warning radar, a couple of generator vans, and several C2 vehicles with their own generator. The cables connecting the entire complex are often visible, especially if the site is only in temporary use.
Missiles 
See http://googleglobetrotting.com/info.php/mid/4328