This veteran of the woods is likely primarily nocturnal, as many dominant long lived bucks are. Your best chance, in my opinion, is during the rut, especially around the full or new moon. Hunt his rub line, but be aware he probably has a huge territory. You might try fooling him to thinking there is another dominant buck in the area with some dominant buck lure, but I'm guessing he might be too smart for that. Good luck and keep us posted.