I typically dayhike the Davis Path at least once a year (have also done most of it in winter) and I have to agree with DougPaul about the lack of water in the summer. The only reliable place to get H2O along the trail is just below the Resolution Shelter.
I also recommend doing ALL of the peaks along the way (Crawford, Resolution, Stairs, Davis, and Isolation). The least scenic is Stairs, but they are all well worth the minuscule extra effort to get to the summits. The hike is mostly wooded, BUT all of the summits are bare except for Stairs, which makes this hike quite scenic. It is also well brushed out (compared to a few years ago when it was more like a herd path than a maintained trail), and generally easy to follow (except in winter).
The other benefit of doing this trail is that you will see very few people...