Hawg...I think I have some info for you, even though it will probably get some crap. First off, in my opinion there is no such thing as a nocturnal deer. All deer move around during legal hours, at least a little. The best time I have found for these older and wiser deer is by far before the sun is up, and after it has dipped below the trees, basicaly, first and last light. In my opinion, the best place to hunt these deer is where they bed....plain and simple. Forget about watching scrapes and rub lines. These are almost entirely made under the stars. Set up as close to where they are bedding as you can, and then wait for the optimal time to hunt it. For instance, if you are not sure where he is bedding, go stomp around til you kick him up. Then you will know. Then, find his exit or entry route in after he bolts and set up on it a hundred yards out or so. Hang your stand, and walk away. Give it some time, say a week. Then, wait for the perfect conditions to hunt it. You need the right wind for the set-up, and you need to get in undetected...when the ground is wet. if you get these two conditions, you have a good chance of killing this deer. Don't rush it. be patient.
Also, when looking for where he beds, surprisingly, bucks like to bed near action. Human action. Check little, thick, elevated spotsnext to roads, highways, houses with dogs, noisy places. For some reason, they use us to break up their boredom. i know it sounds nuts, but it's true. They especialy like dogs. House dogs that is.
All this crap about nocturnal deer is just that....crap. Guys sit over sign that was made at night and never see the deer so they call it a nocturnal deer. He's moving in the light....believe it.
Anyhow, good luck with this one. i hope I helped you out.