I went around the perimeter of this large site before trying to enter. There were four main roadways where entrance was possible, and when I found the main front gate it was open.

I casually walked in, when suddenly I noticed a security booth immediately to my right, with security guard clearly visible. I decided to play it straight and come over, but he was reading and didn't see me, so I stepped to the side where he couldn't see me through the window and walked quickly away.

Later I was walking the perimeter of one university building, when I came around a corner and saw the security guard about five meters ahead, facing directly toward me. I hurried back the way I came. He might have been taking a leak.

I went around to the other side of the building but it was tough to find an escape route because there was a barricade of discarded furniture. Then the security guard came out from behind the building on the other side. I ducked amongst the debris but knew if he kept coming this way he would walk right by me. If I was ducking down he would know I was up to something. But he never came. I peeked out and he was gone. He must've gone back to his shack.

That's three close encounters where the only way I could've escaped is with the right colour camouflage and getting a security guard with terrible eyesight.