Mine pretty much stay close to me. They even roost right outside my bedroom. It's funny bc I only have the one that imprinted, but they all know who gives them their treats. They do tend to include the Saramas in the flock. If you feed them at the same time and place everyday, then they usually always show up for dinner. I feed mine a couple of cups of dog food in the early morning hours (2 cups for 4full grown turkeys, and 1 for my two poults) and then they get their kitchen treats before bed. They've been known to go visit my neighbors' garden, but I am lucky enough to have a 1/2 mile driveway so cars aren't a huge problem for us. I do put my turks up about two weeks before turkey season. All of them, we have (illegal) hen killers around here.
I didn't let my poults out to free range with the others until they were around 3 1/2 - 4 months old. The older ones are better at spotting the birds of prey, but they call to the others and fluff out as big as they can. I guess they try to make themselves look bigger. My older turks are very protective of our flock, this is including the Saramas. They chase off cats, dogs, intrusive birds, pretty much anything they find a threat
As for the flock integration, I feel that you will have a few little spats (maybe not) about dominance, but usually the flocks mix into one with very few problems. The will probably want to check out the flock next door. They are very social animals