I've left them during the week since they came home. When they were little my neighbor kept them until they were big enough to go in the shed. By then they were on nipple waterers and bulk feeders. The first week they stayed in the coop the whole week, after that I turned on the pop door. Because of the hands off way they were raised I do not get to pet them or hold them unless I go in the coop when they are roosting. But otherwise I couldn't have chickens until we moved full time! My neighbor said she saw one or two of them yesterday afternoon after we left so they must have been in the neighbors yard in an area behind a privacy cloth so I couldn't see them when they were looking.
I guess I'll have to trim their wings so they can't go over the fence. I hate to do that because I like them being able to get up into the trees we have around the property when they are free ranging if they need to, we'll see. This is the first time this has happened so we'll see how many come back when I get there on Friday.