If you are thinking that looks pretty smooth you are wrong. It rattled the fillings out of my head when I landed. Mike has an awesome eye for landable areas thanks to his 20,000 hours of Super Cub time.
He chose that line because it was the best thing going for this area, although our tires paid the price. Many of those ribbons of ice are deep enough that if a tire dropped into it you could hit a wing or have a prop strike.
Glaciers are horribly deceiving and it takes time and experience to know what the airplane can handle. I grew up running around on glaciers so I had a pretty good feel for the odd characteristics of glacial ice, plus I had the advantage of running around with Mike before testing out spots on my own. You can teach yourself a lot of stuff but glacier flying is something that has some real idiosyncrasies that are better learned through instruction than the standard crash test dummy approach.
Like Mike always says, "If it looks like it might be a little rough ... IT IS!" This is where the Alpha Omega suspension system and 35" bush wheels are priceless.