Loved your trip report!!
We are much older than you
so we were not quite as active--no kayaking nor polar plunging on the Ponant ships lol. We were able to do a lot of hiking and stopped at a lot of the same stops as you. I agree that penguin watching is awesome--they are the most fun, delightful creatures to watch!! They really are hilarious at times.
It's an amazing place. So hard to describe and the pictures do not do it justice. We often felt like we were on another planet.
And justforfun-- yes we were!