If you want to ensure that your bags fly with you expect to pay for each bag. In my experience jumping on PenAir my bags were left for another flight every time I did not pay. They were often delayed by many (i.e., more than three) days. As mentioned previously, PenAir frequently combines flights. They also frequently change schedules and cancel flights. They will be your worst option going into UNK, but they are a good option leaving UNK for ANC.