There are several of the videos from TAE. These were taken on the crossing during 1957-58.
Only one of the Sno-Cats was a 1955, named "County of Kent" which went to the ice one year before the other three. It is the one with the side windows on the body.
Those who went to Cat's Meow got to see Rock and Roll which was the one the leader Sir Vivian Fuchs drove and is famous for the photo of it in a crevasse. You can ID her by the black compass mount tube above the roof of the cab.