Great shots! A friend of mine just got back from shooting them too. She was there Mar 7-13 staying about 20 miles from Fairbanks. Her weather wasn't quite as mild as yours(if you can call 15 degrees mild). It was 15 below where they were staying and it did create a few issues. She did love the experience.
singleviking-Actually I think next year is supposed to be the peak year of this particular series of flares so maybe you can make it.