Just my own $0.02 here...

That time of year, especially if you want to see the northern lights, I would recommend going to Fairbanks instead. As jackal mentioned, viewing is typically better, plus you won't have to worry about the weather getting you stuck (lived in Fairbanks 2000-2005, and never once was the airport closed due to weather). In addition, Fairbanks offers a lot more in the way of additional activities, and is an interesting place as well. In fact, I can safely assure you that for better or worse, there is no other place on earth quite like Fairbanks, Alaska.

Having been to Barrow twice, I can tell you that it's an interesting place, but there's not a whole lot there. The attraction of Barrow is the novelty of the place as much as anything else, and as a visitor there's enough stuff to keep you interested for about one night.

Or, if it's possible for you, perhaps plan most of your time for Fairbanks, and then do an overnighter to Barrow in the middle of it.

I don't mean to discourage you on the Barrow idea...just trying to give some additional options!

Also, if you do decide on Barrow, stay at the King Eider Inn. Far and away the best accommodations in town...avoid the Top of the World Hotel.