How awful.
I live in the country too and had an isolated stalking incident while running a few years ago. A neighbor gave me a ride home. I can't imagine having this ongoing issue like you do.

I would notify the police. Most of us have called to report things over the years. None of yours sounded over the top with the exception of your son's call. But hey, kids do dumb things.

When I first moved out to the sticks I called 911 to report a fire. I was driving home in the dark and it was smoky all around me. Turned out to be a controlled burn on a farm nearby. It looked like every emergency truck in our county was lined up in the street at our driveway. They were very nice and assured me that it was not a problem.

After my stalking experience I went to the sheriffs department and filled out a report. I suggest you do the same. I did not call, I physically went to their office. I am sure they will take you serious if you are a real person to them and not just a voice on the phone. I also bought some mace. I had only been carrying a knife.

We do not have a gun. Not because I am anti-gun but because we have just never gotten one. My husband recently got his permit to carry but still hasn't purchased a gun. We joke that we are the only family in the country with a sprinkler system and no guns. Transplants from the burbs!