Only problem I have ran into in the past on the Verizon Galaxy Nexus with the camera is if you leave the camera open and lock the device so the camera will be there when you were to unlock. I would sometimes have trouble with it locking on me and requiring a reboot.
As long as you did not lock on the camera app, never had an issue with the camera locking up and I take a lot of pictures. Not sure if custom Roms have fixed this issues but I believe it was a software issue and would happen to everyone. It would happen everytime, but it would eventually happen. Like I said, I am running AOKP and not sure if they fixed that issue as I just stopped locking the device while the camera is open.
And when I mean open, meaning you are taking pictures and just hot the power button before going to something else so the camera will be there when you unock.