Vfrpilotpb ; So you got buzzed by a low flying fixed wing. That's dangerous but it happened and you saw it. But it annoyed you so you thought of chasing after it. That's a pretty stupid thing to think of. One, that's dangerous and two, you could infringe the rule on formation flying. So two wrong never make a right.
An Airprox is the correct procedure - use it.
Nobody should contemplate chasing after and formating alongside a wrongdoer. Just get the facts and submit to the appropriate authority. This is know as 'Captaincy'
vfrpilotpb - a short question. Do you have every helicopter landing site marked on your map?