I've hunted in Bradford County on a friends 400 acres for the past 6 years having made several trips every year to the property. I've never seen a coyote, bobcat, fox, possum, coon or bear on the place.
I put out a trail cam overlooking a dead calf from a local dairy and we have pics of coyote, bear, coon, bobcat, fox, possum, buzzards and crows coming in to the bait.
I have zero doubt that if you want to know what's in an area, you have to use bait.