I start with just a few soft clucks early off, just to let em know I'm there. If I don't get a response, I usually get a little bit louder. Don't start any hardcore yelps. I'm gonna be honest with ya though, I have an edge. Both the my hotspots for birds just happen to be near train tracks so when that whistle blows, I can usually get a shock gobble before the fly down. If you can't hear them fly down, you just have to listen really carefully. Pinpoint the area where the roost is, then start listening to fluxuations in the gobble next time you hear it. You should be able to tell if the bird has moved or not. As far as evening hunts, I don't like them. I stick to the morning mainly because I work pretty much every afternoon. I have buddies who have taken birds at any time of the day. One of my good friends took a beautiful tom a couple years back about 5 pm. In that situation, he didn't need to call. There were ten birds, 3 toms 7 hens in a field and he stalked. By the way boys, less than a month to opener now!!!