I think the key words here are "Strutt Zone".....
Ray's blind is overlooking a well established strutt zone. If the Tom has a hen, or hens with him... He has no need to go there, and all the decoys in the world, nor the sweetest calling ever heard, will bring him in...
He has to "need" to go to that strutt zone, before he will. He has to be alone, and have no hens in sight... This is why the farmer keeps telling Ray that he's seen him out strutting in front of his blind. The farmer keeps reporting a lone Tom, in the afternoon/evening... The Gobbler probly meets up with a hen in the morning. Then, after they're "done" she leaves him flat & heads off to nest. He's all alone, and heads off to find a new girlfriend... To his strutt zone, to sing & dance around, and hopefully get lucky again!!!