Assuming you already have up the no tresspassing signs I would find out who they are and contact the police and let them handle it. You don't say if you live on the property, lease it to hunt, or own it but live far away. Youcan alsostring wire across their paths......I'm just kidding. Eventually you'll find out who they are and 1. Either talk to them and make them aware they aren't welcome or 2. Tell them you'll contact the police if they don't stay off your property, then follow through with it. Good Luck