Your trip produced a great collection of photographs! I followed the link to your Flickr site where there are more photos and they show larger. They look great.
Wow, truly superb images from Svalbard! Congrats and YGMV! I was there some 10 years ago and we didn’t get to see that much wildlife, not even close. We mostly saw birds and the closest polar bear we saw was a mile away.., well, okay, at least 500 yards away .
Looks like you had some great sightings that resulted in some great photos! I've been to Svalbard 3 times, and it has been different every time. We had the most bear sightings in 2013 and 2015, somewhat fewer and farther away in 2017. It may be time to go back.