do you set up and call every so often or do you just get close to were they roost and wait?
I try to get pretty close to where i think they roost and set up, and in my opinion a little calling won't hurt anything.
During my afternoon hunts they seem to sneak up behind you so keep a good look out. They do not gobble hardly ever during the afternoon. I do use call lightly and wait 30 min before calling again. Its never the same so you have to play it out.