This is helpful...but what if I have (or want) to be gone all day? For example, my MIL lives and hour and a half away. I know that I can leave during is AM nap and he'll sleep on the way there. But when is the best time for me to come home? I know that I'll be there past his PM nap...so I do I just leave whenever OR should I wait until 8:00 PM when he normally goes to bed? Any advice?