Thanks for all the feedback and ideas. I had searched for info on the area and found a walking map and information on the shuttle, and we’ll probably stick around Seward. It looks like a great little town.
I was mainly just curious if people knew whether NCL actually organized tours of the area on the debarkation/embarkation turnaround day. On our last time doing this, the cruise line (not NCL) added a tour for people staying on that was sold as a sightseeing tour of Anchorage with time to explore Anchorage. But it ended up that what they did is arrange with the tour company to take people on the tour that ends at the airport (for people leaving), then drop us at Anchorage for a couple hours, and then pick us up to head to the airport to pick up the arrivals. When we got to the airport they said we had to go into the airport to join the group there, and when we did the next bus was full and we had to sit in the airport for two hours to wait for the next flights! It ended up being an expensive waste of time.
So this time we really just want to have a relaxing day exploring Seward, but would be up for a tour just in Seward. It looks like there is plenty to do. We are both very active and enjoy walking and hiking, so we’ll likely walk around town and see what we find.