Check to see if bait is legal first where you are hunting.
soured corn is best, I've used hog wild before, but not too much success with it.

Hunting is best to investigate, most animals are a creature of habit, as far as feeding and watering patterns. Hogs however are nomadic and roam a lot. I'd find a good place to set up by water, or a place with a lot of root marks if you can. Check out trails and check to see if they are fresh by the scant. (droppings)