When in Alaska do as Alaskans do. Given the size and lack or roads in the state often to only practical way to get around in by air. There are more seaplanes per capita than anywhere in the world.
We don’t normally include information on airplane transportation but in Southeast Alaska you may end up needing to use this service. The planes are small (6-10 passengers), but do have scheduled flights. For example, there are two non-cruiseship ways to get to Skagway or Haines from Juneau – a 6 hour boat or a 1/2 hour Seaplane flight. They fly low enough that the scenery can be great . If you want an off the beaten path location they can take you there.