Is it a matter of a late flight out?
People often recommend adding 1 more night to your stay even though you'll be gone before bedtime. It's much simpler, they say, to have the room if you want to swim to kill time until you need to prep to head for the airport or kids need naps (heck, parents may need them if a long, late-night flight).
That way, you leave whenever you need to, more rested and ready to get going.
Could be worth the cost in less stress and rushing about to check out.