That is great that we will be on the same Caribbean Princess New England/Canada cruise. Are you from California too?
As far as the Princess Cruise line, we have gone on 2 of their cruises. We went to Alaska and Mexico, and were very happy with the itineraries, the food, service, and entertainment. Several years back we took 2 NCL cruises but I think we prefer Princess over NCL so far.
As far as the fall colors, I guess the weather has a lot to do with when the leaves change. After doing some research from another cruise site it seems like most of the October '09 cruises to New England/Canada had very cold and rainey weather. Lets hope our cruise weather will be like a mild Indian summer. That would be perfect!
Have fun on your cruise.