they will eat Hickory nuts, but only after tastier things like acorns and corn are gone. Think of it like Granola, yeah....it is food, but there are a whole lot of things I would prefer to eat. Good draws include things like acorns (white oak, then red) corn, apples, nearly anything sweet like honey suckle, grapes, oranges, salt, clover, and if they are hungry enough, they will eat the bark off the trees! Hickory nuts might be a good late season draw, when most everything else is gone.
The only real difference between a good tracker and a bad tracker is observation. All the same data is present for both. The rest is understanding what you are seeing.