Stupid cop doing a 2:40 AM knock

I was camping overnight in my van, next to a sign saying overnight camping allowed (a hiking trail), and a cop- probably the exact same cop that flew in lights on last two times at a very different spot, actually knocked this time.

I pointed put camping was allowed, and he wanted my ID. Then he left. Not really a whole lot he could claim otherwise.

I'm just impressed how remote I am and this super trooper cares, but in the City of Pittsburgh (outside of Pittsburgh proper) there can be a whole line of people in cars and the cops just don't care.

And I know my info is on the licence plate information, he should know I don't have a warrant on me prior to knocking when he scans my plates.