We’ve been on the NCL Jewel a couple of times up there and have decided not to take that ship again. Celebrity Summit was our first cruise and I think it had a bit of a halo effect as we loved it 20 years ago. We are returning next summer again on the Summit.
Vancouver is a great city to get a start from, and Victoria is a great stop. I would stay away from a Seattle start or finish, and only go one direction- not a round trip. We chose Summit - Northbound to see Sitka as we have been there yet.
No need to go on adventurous excursions, just soak in the sites like Mendenhall Glacier in Juneau or the White Pass RR in Skagway.