We don't have wild hogs around here. I understand that they can do a massive amount of damage to the areas they live in. The IA DNR has said that there are small groups of them now in the very southernmost areas of the state, but none this far north (yet). While I certainly feel for the farmers that have to cope with the damage hogs cause, I actually envy you for having such a "problem." If I lived in a hog infested area, I'd be out just about every weekend trying to whack a couple to fill the freezer. Most states don't require any tags or licenses to shoot them, so the cost to put one in the freezer is just gas and ammo (and I can make plenty of ammo!). Iowa DNR has put out a "shoot on sight" request for feral hogs. If you see one, they want you to shoot it right now, with the only additional request being that they want you to call them and report where, when and how many hogs you saw/shot so they can get a handle on the scope of the infestation.
Mike