David, As Andy said, as long as there is no snow cover, golf is playable year round.
When I lived there, I gave up on trying to convince anyone that the place was over watered. It became obviously futile when prior to a men's club meeting, I asked the question "do you guys think this place is over watered?" and was met with a response that only a former Government employee could consider discussion worthy "I'd vote against that". Of course the guy was a decent golfer and happened to be a GD panelist.
I resigned my self to enjoying golf there much more in the winter months, when the system was turned off and the ball would bounce and roll like it was on steroids.
I do disagree with Andy and others who feel Pinon's design is not better than Paa Ko Ridge. IMO, it is likely Ken Dye's best work, but I have not seen them all. I do know that PH basically put Ken Dye on the map, and when he was building it, he put his entire heart and soul into the place. He was so meticulous about every detail, he fired a shaper because he wasn't doing what Ken wanted, as it pertained to fairway shaping.
When played n the proper configuration. Pinon Hills is a great example of how a courses ebb and flow can be felt, compared to how it plays in it's reverse config.