Fairbanks is definitely it...all you have to do is look at multiple nights of maps of where the sweep is to get an idea of where the middle of the belt to view it usually is. I usually go to Alaska in September, which isn't the best month for auroras, but I've had the best luck while in Fairbanks.

Last time I was there I stayed at one of the chain motels, and one night in the lobby there was an aurora hunter/tourguide getting ready to take three Koreans out to find something. So maybe it's a bit like the whale watching around Cabo in that you can improve your odds by paying a bit to go out with a professional.