In Tromso we went with a private tour in a Tesla X. They take a maximum of 5 people, but it ended up with just us and the driver/guide. He had a favourite spot that he took us to near the Tirpitz Memorial on Hakoy Island. The Aurora started showing as soon as we arrived and we stayed for 45 minutes or so until it stopped. He then kindly took us to the Arctic Cathedral on the way back to the boat.
We actually did an RIB harbour tour in the morning that stopped at the Tirpitz site, so it was interesting returning landside to the same place in the evening.
The Narvik skies were perfect for viewing, but we gave up after about 4 hours of our private tour because of the cold. There were 8 on the tour and 5 of us called it quits when the driver offered an early return to the boat. He carried on to another viewing location with the remaining 3 after dropping us off, but I am unsure how successful they were.
We did the late morning Narvik train trip you highlighted on the roll call and thoroughly enjoyed that.
This is our first time with Cunard and it has been an extremely satisfying experience. We are very happy with all aspects of the cruise so far. The itinerary has been a very nice balance of sea and port days. Our next 3 cruises are with Princess and HAL, but we would definitely return to Cunard for the right itinerary.