Get a barrel add corn and water. Let it sit for a few days or even a week or two is better. Get it nice and stinky and dump all the contents on your chosen spot. They will find it and keep replenishing it. They will become more active in the daylight .nice hog........i can't find one to save my life. They are there, but like you said, moving at night only. Won't even come to a feeder during the day.
I thought once deer season closed and things got quite they would come back out, but so far, they haven't