Justin, bring a CO in on it. They love that stuff.Our place in Jennings Co used to have the same issue and I got to know a CO who lives down the road. He goes by the place every day or two. I told him if he saw any truck there other than mine someone is there who should not be.It's worked out well. He found one knothead several feet inside our line, up a tree. His excuse was "Oh, I thought I was on Grandpa's property " The CO ..."your grandpa lives a mile from here " No more problems.. The only real trouble we have had lately is the landowner who butts up to us to the south died a few years back. His widow still lives in the house but getting infirmed. He was always a joy to get along with,he knew the property line, and we knew the line, neither one of us had to post signs. After he died the two sons who live in Indy thought the line needed posted. They put a sign on trees about 10 yds apart. One tree of course was 10 yds inside our line and the tree was a big black cherry market tree. I had to go get a hammer to pull the 16 penny nails out of the tree !!!! I really wish Indiana had adopted the Purple Paint law . It was part of the original DNR centerfire proposal/ hearings but somehow got turned down. Signs are getting awful pricey.