As a retired forester who spent more than 40 years hunting the woods of his native Alabama, Kelly says the best way to learn a property is to walk it. Sure, today's high-tech aerial photos can be of use, but actually walking a forest--the trails and stream sides--to see how a turkey will use the terrain is vital. Terrain can change from year to year, as well as when forests are cut or groups of trees fall down in storms. Water in swamps and creeks can ebb and flow with the rain. And a field that was open for strutting last year, for example, may have gone unmowed, making it less attractive to birds. Although wild turkeys do fly over creeks and fences and go around blowdowns or thick cover during normal travel, they're often reluctant to cross such barriers when responding to a hen's calls. Kelly recommends walking the terrain to become intimate with potential obstacles--creeks, fences, thick tangles of brush, blowdowns, steep hillsides, anything that might impede a bird's approach to your calls. Then keep them in mind each time you set up.