What state are you hunting in? I hunt hills and breaks also buttes. I hunt where there is alot of coyotes and I think it makes it hard to hunt because they are very sneaky but just my observation. You can hunt all day in that terrian spot and get in close and start to call. They will roam around and I think early morning is a waste to me. Just get in early and find where they are at and go from there. If there is a grain field or feeding spot you know of start there.