Early season and up until around the 1st of October, I would keep scents out of the equation, and only use contact grunts and social calls. If anything at all. Quite honestly, in the early season, find the food that they are attacking and set up along a route to and fro that they use. Early season, and until the bucks disperse and change into their fall routines, is when bucks are most "patternable," so take advantage of it. --All they do is eat, drink, and sleep right now.