I understand your concern regarding free ranging. My pullets are 8 mos old. They are familiar with their coop.
They also have a very large run with things to do but some, will manage to get out leaving the others behind. So, this is what I do.
I let them out to free range on our 3 areas every afternoon. Some areas are also heavily wooded.
I have buckets of water in various areas for them because chickens don't always know to seek out water when they are thirsty. Plus, they don't know to come back to the coop to take a drink. The buckets have f4esh or just rain water in them.
I also put a small amt of scratch outside the coop.
They come back to lay an egg if one hasn't already. They come back everyday around dinner time to get ready to roost.
Sometimes, I don't see them outside either. When I'm home, I'll go out and call them and rattle some food in a can and they come running!!
I do this to keep them trained and to check on them.
I believe they are better out together then a random free spirit out on her own.
I had to cut my umbilical line to them and let them be chickens and forage to eat bugs.
Hope this helps ya.