One of the people I farm for has an extensive chunk 500+ acres. Shes an elderly millionaire, but in great shape and very with-it.
After her husband passed, she found herself inundated with hunters, trappers, fishermen, 4-wheelers, night spotters, motorcycles, etc.
She had to hire a pretty prickly tough guy and let him live in a guest house on the property to get rid of them. He’s a friend of mine. I farm the property. He explained to me it took him close to 5 years to get rid of all of them. Some went on first encounter. Some involved fights and threats. He spent a lot of hours sneaking up on them, chasing them in a 4-wheeler, etc. Some were wealthy neighbor’s kids and it caused some uncomfortable times for them.
Growing up on my parents land, my father, brother and I had some confrontations with trespassers, too.