I never changed my tactics for times of day, if you know where the birds are, get as close as you can without exposing yourself, set up and give a few yelps and wait. Always expect a bird coming from anywhere as well, you may have one coming in gobbling his head off, you also could have 2 coming in from behind not making a sound. This part of it I think comes with experience and as mentioned, patience is key.
Decoys' I just started using them in the past 5 years or so, never used them for over 25 years and still killed a bunch of Toms, they sure can make some situations easier for the visual candy, but sure not absolutely needed.
I like getting set up before daylight, a owl hoot often will get a gobble so you know generally where and how far they are. I can't count the times I have had Toms fly right to me within yards str8 from the roost. They have no problem flying a few hundred yards, as long as they have a place to land.
When I have a tom coming in (sound gets closer and closer) I may throw a yelp here and there depending on his motivation. If he is moving fast and talking up a storm, I will jusy let out a 2-3 yelp so he knows within feet of where I am. Call to much and he will expect you too come to him IMO.
Hen'ed up toms are trophies and can be a mofo, at that point I will try to call the hens in, all you need to do is convince the boss hen you are lost, found food whatever. Sometimes it's easier to get an idea of where they are going, circle around at a safe, undetectable distance and set up, then call her with tom in tow.
If you hunt long enough, you will find you call in more hens, especially when they are broken up nesting, they are a "flock" bird and like each others company, I have had hens step over my extended foot before and it is exhilarating. If you hear yelps coming back at you, usually in a 2-3 yelp set, maybe a few location type "putts", she is trying to locate you. This can be a good tactic if for some reason you bust a tom and his hens accidentally and they fly and scatter, then, be the loudest, controlling hen and they may converge on you to re-group.
I have raised rios and hens are very vocal all day, just usually so soft you have to be close to hear it.
One more "idea" that often works on a hung up bird without hens., If you are convinced he has came his limit, either because of terrain or suspicion, try sneaking back and away from him 75-100 yards, then give a few yelps, if he thinks you are leaving, this often gets him enough,he may come on in. I used this "tactic" when I took my brother for his 1st and only turkey hunt. Had 3 tom's hung up on a fenced 4 corner intersection on the neighbors place, we started moving back to the truck parked about 500 yards, I would give a yelp about every 50-75 yards and by the time I made the 3rd calls, all three nearly ran us over!, we had enough time to drop to the ground and raise our shotguns, took all 3 home..
If I knew how to get a video off of an 8mm tape and upload it, I took my wife for her 1st TH, 3 toms flew in to about 6 yards, scared her to death, but she got one, but forgot to shoulder the weapon in the excitement. She fired, bird fell and the shotgun flew over her shoulder and missed me by inches
Sorry so long