So my BIL and his were visiting us and are leaving tomorrow. DS (27 months) adores them and will be pretty upset when they leave. Should we have them sneak out without his knowledge, or say goodbye to him when they leave? They would leave our house close to his bedtime, so I worry about it causing a bad night. Also, my husband will be taking them to the airport, so I will be home alone with DS and the baby. But I don't want DS to think people just disappear, without saying goodbye