I have never seen an aurora in situ, but I find these photos stunning. Yes, different from the ones in color but yet stunning.
I love the reflections on the lake, especially those in the first and fourth photos.
You say you never planned to publish all of these. In my limited experience, I have found that some of the photos I don't like enough or consider good enough, turn out to be great after editing. Those details that are hidden and start to surface once you play and experiment are precious.