I wouldn't get discouraged. I hunted all weekend, and literally heard about 5 gobbles if that. I only saw 2 birds, both toms.....and killed both. I was more lucky than anything. If you use decoys try to set them up where you are in between where the decoys are and where they roost. I use decoys off and on, this weekend, I didn't use any. I had 1 bird pop out at 7pm, and made a few calls on the slate and he came to me after about 10 minutes. It was windy, cold, etc. I only saw him gobble once.
I hunt out of a blind most of the time, but when it's boring I'll get out and move on foot if I haven't seen anything for a couple of hours. Hit the slate every 100 or so yards and if you hear one it's in the area.
Turkey hunting isn't like deer hunting. They move and gobble all day long if the time's right. Obviously, it's good early in the morning, or later in the afternoon where they are going to roost, but they will move all day. You can hunt them off and on all day when the weather is right. Patience is the key and just keep at it. If you have pics of birds, they are there....you might just have to find them.
AS far as where they roost...if early in the morning, get as close to it as possible while dark in my opinion.