Don’t focus all of your attention on primary food plots. While we see a lot of does and smaller bucks in the fields at dawn and dusk, the big bucks will tend to visit these locations only under the cover of darkness.
We are better of finding secondary food sources such as mast crops in heavier cover. Bucks often go to ma st before entering the primary food source. Look for acorns, apples, berries, honeysuckle, and other soft browse in your area.