To piggy back on Karl's post, a little scouting will give some information on where they are going after fly down. Turkey's need water soon after waking up, as well food after drinking. Then they loaf around all day and strut for the ladies in Spring. If the terrain around the roost isn't suitable, pick a spot between the roost and wherever they end up each morning. The more you hunt the better you get. Keep at it and good luck. Once you kill one you're addicted forever.