Here's my 2cents and its worth what it cost you.
Step 1: Make very good friends with local law inforcement!!
I had a problem with a neighbor's dogs running my deer. The neighbor called the sherriff when I told him I would shoot a dog running deer on my land. The sherriff told us both that on my property, any dog without a collar was a coyote and any dog with a collar was a coyote with a collar. Just because I don't live on my hunting property doesn't mean that i don't have rights.
Step 2: Good comunication is key.
I wanted to spotlight coyotes and pigs on my place, so i contacted the local game warden and told him what I wanted to do. He asked what guns I wanted to use and when I thought I'd be out. I invited him out to check me out if he wanted to. He said that it wasn't the folks that invited him out that bothered him, it was the ones trying to hide what they're doing that made him curious.
Step 3: If all else fails, do like A5Mag said and buy or build a trap. Pig traps are cool and can be a ton of fun. Another neighbor has a small trap, 4x4x8, that he pus out for fun and I have seen 11 pigs in that little trap. Mind you, the biggest weighed 105, but they sure ate good.
Sorry for the long post.