The overnight guest policy can differ from facility to facility and may also depend on the type of room your loved one has. If they share a room with someone, they might not be allowed overnight guest, or they might have to get consent from their roommate to do so. If your loved one has their own room, a good facility will allow you stay overnight with them. There may be a signing in process and rules you have to follow for security and privacy of other residence but that type of protocol is common for quality facilities. If a facility does not allow overnight guest when your loved one has a private room, it is best practice to ask them the reasoning for this. If what they say does not make sense to you or seems off, it might not be the right fit for your loved one.