I worked for a company that owned lots of land. The company allowed some of the employees to lease it to hunt on. We had a terrible problem with littering at the gate and treepassing. Had people come in and steal things. You know, the typical thngs you get when you don't allow people to abuse your things.
Anyways, one of our members was out camping with his family a couple years ago and here comes a whole possey of 4 wheelers. They had ignored the signs, the locked gate and all. When confronted they knew they had Brian out numbered and acted appropiately for the trash they were. Asking him who had given him permission and what right he had to tell them to leave. Real winners.
I hope you have no further problems but after being involved with large landowners firsthand, it is a on going battle. God Bless