As noted above...rent a car for sure...they'll be cheap this time of year. Grab the best deal you can get AT THE AIRPORT! Avoid the independent "off airport" places that you'll find using orbitz or google. They have weird hours and may well be closed for the holiday.

The Northern Lights are sketchy in the city. Too much light. If you drive 10 or 15 miles out of town though...and the clouds are cooperating...you'll get to see them. No guarantees though!

I'm not sure what my Christmas plans are yet. If I'm around though...I'd be pleased to meet for a toast and some cheer! I'll keep you posted.