The water sources were fine. First of all we had running, piped water from the faucet at each camp - Castle Rock, Waterman Gap and Jay. The distances between camps were around 10 miles, but we always got water around the midpoint for lunch. On Saturday, between Castle Rock Trail Camp and Waterman Gap Trail Camp we had lunch at Travertine Springs, where we got water.
On Sunday, between Waterman Gap Trail Camp and Jay Trail Camp we made lunch at Boulder Creek (right before China Grade), where we got water. On Monday on the way from Jay Trail Camp to the beach we decided to use the alternative route over Mt. McAbee Overlook, where we had lunch. That meant we had to carry the water for cooking lunch up there. On the standard route we would most likely have gotten water at Kelly Creek (or the latest at the intersection with Waddell Creek which had water). So I would say water is even now no problem. There was never more than 4-5 miles without water (with the exception of our planned deviation of the route via Mt. McAbee Outlook).