If you are feeding anything with corn they will find it. My bout with them was because a neighbor had a deer feeder spewing corn out twice a day right below my property. I had a friend that traps them bring a homemade trap out and we captured a few but when the feeder stopped operating they moved on.
His trap was just some hog panels tie wrapped together with a hog panel on top. He had a couple pieces of narrow channel for the plywood gate. Just ran a rope off the top of the gate to the rear of the trap with a stick tied onto it. Drove a couple of stakes in the ground with screws to hook the stick on. Hogs would trip it rooting around in the corn.
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That is nice trap. No one should be feeding corn any where in the area due to Chronic Wasting Disease. Most of the property near me is either family owned land, land we lease the hunting rights on, or National Wildlife Refuge.