There's no mention in the Camry's owner's manual or scheduled maintenance guide about PCV valve replacement.
Wikipedia says, "Typical maintenance schedules for gasoline engines include PCV valve replacement whenever spark plugs are replaced."
The '06 Camry Maintenance Guide mentions to replace spark plugs at 120,000 miles or 12 years, and to inspect the engine valve clearances at that time, but no mention at all is made of the important PCV system that recirculates blow-by fuel and water vapor from the crankcase to the intake manifold en route to the combustion chamber for re-burning.
By the way, iridium spark plugs lasting 12 years is great. I remember my old Dodge Colt needed new plugs every couple years or so. I guess that's one of the advantages of having iridium and also having a Direct Ignition or Distributor-less Ignition system. I'm getting into this car talk.
Not sure I'll be able to resist changing the spark plugs for 12 whole years, though. Maybe 8 or 10.