I envy you guys with the 08's and 09's right now. Getting to the valve cover on my 10' was a major PITA! Took longer to get to it then to remove the cover and check all the valves.
While your in there, take your time, make very accurate (triple even) measurements before pulling the cams. Plan on pulling the cams and creating a map of what shims you have regardless. It is good info to have.
Also, one word of caution, when pulling the cam covers, be extremely careful with the dowel pins under the caps. One of mine jumped out of site and I didn't even know it was missing until I was taking inventory. I found it down in the spark plug hole. Luckily I had just put the spark plugs back in before pulling the caps, just in case.
Good luck!