To date my daughter, 6 years old, has been spending alternate weekends with her dad at the home of a member of his family - as he had no home of his own. It now seems that he is planning for her to spend her weekends with him on a houseboat which he has just bought. I am worried about safety issues. Is this safe? What if he nods off to sleep? Should I be asking for any particular assurances, safetywise? Any help MUCH appreciated. Thanks.