I have been raising them for a year. They are not aggressive ever, you can go up to the males and pick them up if you are fast. If they start to roost somewhere that you don't want them to, stop it right away, or they will never break the habit. They are very easy to raise, but if you have chicks, do not let the poults be with them, or when the chicks start to replace their fuzz with feathers, the poults (baby turkeys) will peck at their anis area (because it is pink/red) until it is basically almost inside out, and they will die. The reason I say they are so easy to take care of is because we just let ours out and they will roam around and eat things, come inside their coop, and just barley eat anything, a 50lb. bag of food will last us a month sometimes. In the winter, they will scratch at the snow if it is not deep and eat the grass, or find a place that was sheltered and eat the grass there. They will eat snow in the winter if they don't have water, but i would not let them live off of the snow, we still water them. I do not know about laying, but i do know that they will lay. You would be better with a young couple to start off with, but only let them live to about 6 years of age, or the meet will start to get tough, and they start to decrease in laying. I would only keep about two males, just in case one dies from a coyote, wolf, ect. If you do keep more than one male, you will see them fighting in the winter/fall primarily, but also in other parts of the year. The reason for this is because they are trying to be dominant over one another to decide who will mate. Do not try to break them up, sometimes they lock onto eachother's mouths and "french kiss." I tried to break it up, and i ended up lifting them off the ground. If you would have any chance of stopping it, it would be the first time one hits the other with it's wings, the only solution would be to seperate them. This is the only time they are agressive, but still, you could do anything you want when they are doing this, and they will not hurt you. Do not think that you need them in a green house or a sheltered area, ours wouldn't go in last year when we had a blizzard, the snow drifted about 5-7ft, and they didn't go in once. I would keep a place where they are safe from predators though. We have about an 8ft by 8ft area with five turkeys in it, we originally had 7 in there, but we lent one to our friend because he ended up getting three females and no males, and once they wandered off(which they used to do a lot when we let them out all day) and one of the hens didn't come back. We do however let them out as much as possible. The females can and will fly. You will know when they are ready to be put up when they start to roost in a tree or other high up place, for us it's the back board of our basketball hoop. Overall, I think they are a great breed. They take care of there young, build there own nests, and are very socialable with other turkeys and humans. They aren't terrified of our dog, but they do kind of jump when he runs by. The only bad things about them are that they wander after about eight hours and go in the road to get grit, which will help their digestive system. They almost always come back in the evening though. The only thing you really would need to worry about with wandering off is weather your neighbors will mind or not. They also poop on our deck, which they have a habit of getting on and peering in our glass door to see what we are doing. They would come in if we let them.
If you have any specific questions, I would be happy to answer them for you.