1 - I played in a group that utilized the services of a long tenured caddy at Chambers Bay. He said that he'd seen Ryan Moore play twice at Chambers Bay and shoot mid-60s. To be fair, I think he was ONLY playing the 7,100 yard tees (I worked hard to get score decent from the 6500 tees), but I'd watch for Ryan to make a move this year.
2 - The front nine is REALLY hard. My guess is the front nine will play harder than the back nine. I've heard a lot of chatter about how the course is really tough, but I played under my stroke average, thanks to a good score on the back nine, which had some birdie holes.
3 - Chambers Bay will play long, has few trees and will reward creativity: does anybody like Bubba Watson's chances? I do.