Sounds like their patterns are fairly regular. Do you have a trail camera? Post it where you want to kill one and see what time they're coming through. Have a back-up plan -- they may not be taking the same route every time. If they don't come through, head for those grapes.
Turkeys can't resist wild grapevines with prodigal output. Good luck.
When [url="http://www.EverydayHunter.com"]"The Everyday Hunter"[/url] isn't hunting, he's thinking about hunting, talking about hunting, dreaming about hunting, writing about hunting, or wishing he were hunting.