That does sound rather nice, as I'm sure the views, among other things, are breathtaking.
Is the weather, as one might tend to believe, generally colder, regardless of season? Or is the inside passage cruise also one where you can lounge by the pool in summer?
It can get rather cool at times even on a sunny day, and don't forget when the ship is moving you will get a little wind from her movement.
I wore shorts at time on our early June cruise last year, but lots were in sweaters and Jeans.