Set them out on a high place in a field where they can be seen for a half a mile or more and don't call.
Ya know, when you look down your nose at someone...its really not a pretty sight for the guy looking back.
The guy asked a question on how. He really didn't want an opinion on whether or not to use a decoy. That will come up again I am sure. Talkin' on a message board is a bit like turkey hunting in some ways. Its better if you know when to say something and how to say it. Otherwise one can look a bit...silly.