I would bait with someting other than corn or grain. ALL grain must be removed for 10 days before it is legal to hunt waterfowl. I have seen spolied fruit used for hogs before. You may be able to get that free from your local grocery store.
Apples work great, or try to go now on a pumpkin farm and see if theur have any leftovers now that halloween is over. They love pumpkins. Smash a few with a sledge hammer and you ahould be in business. Will attract millions of ants though.
Most pigs love: cooked broccoli, pitted apricots, cucumbers, dark green lettuce, cooked potatoes, beets, grapes, pumpkins, all squashes, zucchini, snow peas, spinach, yams, kale, tomatoes, chard, carrots, pears, apples, berries, oranges, grapefruit, melons, pitted cherries, pitted peaches.