This is BS. I flew, in a past life, for a large Part 135 cargo outfit that flew for UPS. I flew to many small to very small destinations. If Brown can do it, why can't Purple do it?
I still remember dropping off boxes to a brown lock box in Eureka, NV. There was a runway, but no taxiway, a very small ramp about the size of 2 BE-99, a hangar that was falling to pieces and a large, brown steel box.