Good question - I had the same one and was happy to learn that cameras are permitted Mon-Wed since the tournament is not underway. Cell phones and pagers are completly restricted all week. Monday and Wednesday were slated for Pro-Am events and Tuesday was open practice. It was a good day to go IMO. The players seemed relaxed and more easy going.
When snapping pics at the range, I was literally standing right behind some of them so I turned off all sounds on the camera out of respect.