I have used locators in the morning, with very little success. I typically get into the area I know they are roosting in, and simply sit from an hour before sunrise waiting to hear them gobble on their own, or simply the sound of their wings. They birds I hunt are pressured quite a bit though, and have heard every locator in the books....but the hunters that use them rarely leave the edge of the field and won't hike up the mountain to where the birds go when they are pressured. Last year I worked a pair of mature gobblers only 200 yards up the mountain from a field where there were 2 hunters listening to me work them......I heard their textbook owl hooters at first light and box call yelping as I was working these birds but they never got up to move on these gobblers. The birds never gobbled till half an hour after light once these guys put the hooters away. You should have seen the looks on their faces when I walked out by the field half an hour later with a 18lb 10 1/2 inch bird over my shoulder.