Tips for going to see the northern lights (in Alaska):
1. Make sure you are visiting during a new moon so that the moon doesn't interfere with your ability to see the lights.
2. Get outside of the city - Mt. Aurora is a great spot for viewing
3. Be prepared to stay up LATE, they come "on" around 10/11pm (which is 3 hours later in Central Time).
4. September and March are good times to go because it gets dark enough to see the lights but isn't as cold as winter. We stood outside in -23F. That is cold. You have to plug your car in at night so that it will start the next day.
5. Schedule dog sledding, check out the Hot Springs, and plan to see the ice sculpture competition if the timing is right.