In new areas I plan to hunt I start now and will find those winter flocks.
Then I take a good look at the terrian as others said as they break up for spirng I figure out where they will go.
I then spend time asking landowners if I can hunt. The landowners can be very helpfull telling you what they have seen in the spring.
On many of my established areas through the years I have slowly trained the landowners to how big a bird I am looking for. I get great reports via AT&T! I call it my AT&T Turkey scouting!
Right now I am looking at a new piece of land for a Rio hunt. I have never been there but the landowner has given me details to what they expect in the spring and has located 2 flocks of over 100 birds or more. I am sure there is a Big boy in there.
I then have gone into my Topo map program and have earmarked a few river bottoms that I am sure will have the necessary roost trees. So I have slowly cut my search down to these areas when I get there next spring.
JW