While I am really looking forward to photographic opportunities on the cruise (I think I have more camera gear than clothes packed!!!), and I REALLY hope that we get to see the aurora, I just want to point out that getting photos of the aurora is highly unlikely given the circumstances that we will be in.
In order to take the really cool photos of the aurora that you see, you need to be mounted on a tripod, and use exposure times of 6 seconds to a minute or longer. Given that the best time to see it will be in the middle of the night, we will most likely be on a moving ship at the time. Trust me, I wish that we would have the opportunity to photograph it!! I just don't want anyone to be disappointed.
I think that this is one time to put the camera down and just enjoy the splendor of the show if we get to see it. There will be loads of other photographic opportunities.
I agree that it would be fun to try and get together and meet if possible.