Like most have said, I'd keep it light and not as often with some leaf scratching thrown in.

If there is a way to catch him the evening before getting up in his roost to pinpoint his location in the morning. I would come back in the morning and setup within 150 yards of him, softly tree yelp once or twice, do a fly down kackle with a wing if you have one, and then shut the hell up.

Lefty Llewellyn