It's been 30+ years since the Concord(e) paid a one-off visit to a nearby airport, whereupon a colleague and I drove up to a construction gate at the perimeter. We were both in business attire, I had a professional camera at my side, and we announced to the wino guard that we "were there to get press photos; was there any area we had to avoid?"
Said wino stammered "Well, just don't drive on the runway..." and waved us through.
We got some pretty good shots from the perimeter road.