Peanut butter works well, but it will also attract a lot of other varmits too.

But the best non-commercial bait a hog-removal guy I knew used was a mix of corn, chocolate syrup and strawberry Jell-O powder buried 18" down in a posthole. Leave a few bits on top to get their interest...I bet hogs would root up a blacktop road to get at that stuff.

Once you get'em used to coming to a feed site, make a "pig pipe". Chain it to a tree, fill it with corn and they'll knock it around for a long time.