Well first off if your turkeys are like mine, they roost in generally the same area...so if you know your turkeys...then you have an idea where they will be. That may not be the case...I would try first off make sure that your owling sounds realistic and it may already...Just makes sure its the right cadence and sound...I use my voice now...but when i started I would have 2 different hooters, and very frequently i could hoot on one that would get no response, and the other would make them gobble all the time.

Do you have owls in your area??Because suelry then you have heard a tom answer a real owl or two...

Same question for crows...do the turkeys not go crazy on the roost and early morning when the crows are fired up as well???

Now many times a turkey that will gobble his head off in the morning...may not gobble in the evening, especially if he is roosted with hens....

The main purpose of the gobble is to attract hens...if he has them he has no need to gobble aloton the roost in the evening.

I dont know what to say other than if your turkeys respond to the real thing but not you, you must be doing something sound wise or cadence wise, or bad timing compared to the real thing. It wouldnt make sense otherwise even though i wish i could give you better advise oter than maybe try a different hooter or crow call....or make sure you are using them realistically....

I wish you luck!!!