Doug,
Thanks for the clarification. I was really hoping not to pull the cap. My wife and I just finished renovating the top of the 5er - and had we known there was a problem (there has been no water damage inside the rig) I would have remediated the problem before I started the renovation inside.
I believe the damage was just caused on the last trip. One of the RV Parks we stayed at was subjected to the storm that hit califorina - and we were pelted by acorns the night before we went into yosemite. I found one small cut in the roof and it looked fresh.
The good news is if I have to replace some the of wood on the roof, I'll get to check my AC Vents and make sure they aren't leaking and put new insulation on top to reduce heat transfer.
Thanks again!
josh