Alaska is huge. Other than in the few cities Alaska has a very low population density. I believe that is primarily why a lot of Alaskans never move away. It's just too crowded everywhere else. Susitna North is an in-between place. I used to think it needed to be recognized as its own place. I have changed my mind about that. Here is a link to the Alaska GIS website. It doesn't go very fast on my phone. 

Alaska Mapper