Are you going to be photographing the northern lights? If so, be sure to get in a lot of practice beforehand. My wife and I went to Iceland to see northern lights in October. We were there one week and only saw them one night for a couple of hours. So I was frantically trying different things with the camera while they were out and ended up not having things in very good focus. So the more time you can spend out in the dark trying to photograph the stars before you go, the better off you will be when you get there. You can try out your new flashlights too! A good low mode is good for adjusting camera settings while not destroying your dark adapted eyes. The other thing for us was that we were able to just step out of our hotel room and see them quite well overhead, so did not really need a lot of flashlight. However it would have been better to be in a really dark sky location where you will need good flashlights. Have fun!