Daniel, Some good input there from Grizz and Retranger. If you have limited scouting time, by far the most effective strategy is to get in the woods early (before daylight) and get to a high spot where you can hear gobbling from a distance. This time of year the Toms gobble on the roost nearly every morning depending on weather conditions. A still, windless morning will let you pinpoint where the roost spots are. Keep in mind that some mornings they may not gobble. (why? Who Knows?) A couple of these early morning scouts are all you need to home in on a good set-up spot. You can even be home in time for breakfast. Once you have located a potential spot for opening morning, it's best to keep away until season opens. To many scouting trips in and out of an area can spook birds. Retranger, my favorite call is also the Grand O'l Master. It sounds incredibly real and it will really carry out there even on a windy day. I've also found that one or two series of yelps right after they fly down is all it takes. Once they hear it, they will usually come to investigate even several hrs later. It is a big box call (large and in-charge as they say) Daniel, good luck with your scouting it can be as much fun as the actual hunt. JeffCrez.
"Fall hunting is maneuvers, Spring hunting is war".......Tom Kelly