Even at 5yo, DS1 needed a midday break most days (but he wasn't a stroller snoozer either). By the time we got back to the room and got ready for bed, it was well past their normal bedtime and so we'd usually just head to bed, too, so that we could all get up and go in the morning. Some nights we'd watch TV after the boys were asleep, or play cards in the bathroom area, but mostly we slept when they slept!
WDW is exhausting for grown-ups too.
Beth, mom to older DD (8/01) and younger DD (10/06) and always missing Leah (4/22 - 5/1/05)