Start on a map, not in the woods. On satellite imagery, mark every open field, pasture, logging deck, and burn edge within a mile of mature timber. Turkeys need open ground to strut and see, and big trees to sleep in — the seam between the two holds birds.
Then walk roads and ridges rather than the timber itself. You are looking for tracks in mud, scratchings on oak flats, and droppings under big limbs. A mile of ridge road tells you more in an hour than a mile of thick creek bottom.
Finally, check pressure. Trailhead parking, fresh boot prints, and cut shooting lanes mean the birds have already been called at. On public land, the extra half mile past where the boot prints stop is worth more than any call in your vest.