Sorry to hear about your issues Jim. Game cameras or a security camera are IMHO a must in your situation. When we first purchased our property we had a neighbor that constantly rode horses onto our property. We found an area of fencing (barbed wire) that was cut so we repaired it. The idiot neighbor cut the fencing and continued to ride onto our property. So I repaired the fence a second time and posted no trespassing signs about every 50 feet along the fence line. I also spread the word amongst neighbors that now that my property was completely fenced and posted that I would call the sheriff if I caught anyone else on the property.

I wish I could tell you that this ended the problem but it has not. Occasionally we still see some signs of trespassing.

At least by using cameras you might be able to catch an image of the idiot on your property.

JHAP
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"My mind is a raging torrent, flooded with rivulets of thought cascading into a waterfall of creative alternatives."
...Hedley Lamarr (that's Hedley not Hedy)