Fill a bucket about two thirds full of corn. Add water until it covers the corn by three inches. Sit the bucket in the sun or in a warm place for a week or two. Nothing attracts hogs better than sour corn.
To keep the hogs hanging around longer; make a hole about 30" deep with a post hole digger. Fill the hole with shelled corn. The hogs will dig and root in that hole until the corn is gone.