Took a little overnighter Monday. Woke up, walked out and saw a puddle under the rear wheel with a steady drip.
That's right under the shower so I immediately assumed I had a leak in the shower someplace. Thankfully my more level-headed wife traced the drip back.
It ended up being a fitting way in the water works - the web of piping by the water pump, behind the valve panel. Not too bad to get to, not easy, but not too bad. I found the right fitting by laying down some dry paper towels under the pipes and waiting for the drip to land.
It was a new leak, so I can only surmise that the screw fitting worked it's way loose from the bumps and jars of a year of camping.
Anyway - the lesson for me was don't assume that if the factory fittings weren't leaking in the past, they won't in the future.
And - since I was in the Fix It mood, I went under the coach with a can of "Stuff" the spray urethane sealant. I found a half-dozen holes that weren't sealed up properly. Might be something for others to consider too!