So, this was new (to me). The captain plowed 100 yards into the pack ice, a red carpet was rolled out from the zodiac platform, and guests wandered out onto the ice. I think our three previous visits were the wrong time of year - there’s a relatively short season/weather window, when the ice is not too thick/strong and thus prohibitive for the ship, nor too thin and weak for people to safely walk around. A new, fun thing! (Pretty much the same experience as Shackleton. 😎)