Consistently killing turkeys in the timber requires good calling, preferably with a mouth call, which is more versatile than a box or slate. And in a tight setting like this, your hands need to be on your gun. More so than calling, however, it's the setup that will make or break your shot. Sure, you'll call up the occasional kamikaze 2-year-old from a half mile, but most timber toms seem to have a zone—a distance from which they can't help but respond—and if you can slip to within that zone before setting up, your odds of killing that turkey double. Maybe even triple.
I'm happy if I can get within 100 yards of a turkey, but 75 yards is an in-zone guarantee. You'll spook some turkeys sneaking that close, but the payoff is so high, I'll take that chance over and again. To get in the zone during daylight, you have to use the terrain to your advantage. Even dense foliage won't hide you from a turkey that's 50 yards away, but they can't see through hills. If keeping a hill between you and the turkey requires circling for a half mile and ultimately crawling the last few steps to the perfect tree, do it. Of course, knowing where a turkey is roosted is even better. Get there an hour before daylight, and you can sneak in close enough to see the gobbler's limb shaking as he wakes up—and close enough to be in gun range when he flies down.