Fence your property. Do a good job. Go down to the pound and get a big dog. or two, or three, Keep them outside and let them roam. Soon your yard will be their territory.

Forget the guns, traps, cameras and other junk. One day some rip will make a grab for your girls. Dogs will catch him, and maul him. Make an example of him.

Now your property has a reputation. You are now the crazy SOB that let so and so get mauled. People talk. Then they leave you alone.