My question on the 6yo who wakes early is, what is his total sleeping pattern, and where are there opportunities to adjust it? Maybe he's waking too early because he's going to bed too early, or because he's taking a nap that he may not need.

Our DD10 no longer needs as much management in that area as she did when she was younger, but we still continue to monitor her sleep with a holistic view. So if we took a long car ride and DD knocked out, we knew we'd probably benefit by letting her stay up later that night, or else she'd be waking us up early.