For the first time, I saw a flock of 9 turkeys while deer hunting this past weekend. There were 2 big guys, 3 medium sized, and 4 small one's. Is it normal to be grouped up like that?

I thought they reproduced in the spring, so how would one go about hunting them in the fall? Food sources? Do they have actual nests, or do they just roost on a limb? About how high up would they be?

I'm very new to turkey hunting, this spring will be my first time going out. I've deer hunted for 15 years, and muskie/bass fished even longer than that. Now I'm looking for something new.