I work for a group home firm and I can tell you as long as she does not have her own guardianship if she elopes what will happen is that the home she was placed in will start out with a call to local police/ sheriff dept ( this is XYZ I am a employee of _________ and im calling to report that we have a client who has broken supervision ( they will provide a description inc what she was wearing) then when she is found she will be forcibly returned to the home she had been living in , If she has enough incidence of poor choices while she does not have self guardianship they can do alot of things like install locks on her closet door and move ALL clothing into it so say at night if she chose to elope she would have nothing to wear. ( the home she lives in might already have door and window alarms, Depending on the laws in the state she resides she could be physically restrained during a elopement attempt if the elopement could lead to self injury. AND on your end of things if she were found with you there is a possibility that you could be charged with a crime related to abuse or neglect laws for vulnerable adults in the state you are found in with her being with you. If your going to continue having a relationship with her then just wait until she turns 21 and has her discharge papers, they really will be getting them ready for her unless she makes so many bad choices that the courts are used to extend the current guardianship. she has a log book that will have things in it possibly like a way to record non compliance , verbal aggression, physical ag, social innapropriate behavior so keep reminding her to just hang tight , make good choices and stay compliant with the rules in the home she lives in.