Yes, we are all very experienced on class 4. Though I have found the classifications to be different, it seems in every state. Class 4 in Red Rock is different than class 4 in the Sierras and class 4 in Colorado. Hell I did some class 4 in the glacier national Park and I thought it was class 5 and the class 3 really Should have been designated class 4 on a couple of peaks we did. Anyways. Yes, we're experienced on that. It's just the snow snow climbing that we are fairly new to. I have a friend here in Vegas who used to climb with Fred Becky back in the day. When I asked him about Sahale He replied that he felt that glacier was fairly benign. Some people will do it with crampons and not roped up. Some with. He also mentioned that the beginning of that glacier was the steapest section and we would be able to assess the danger quickly.
Now he also said he hasn't done it in 15 years and he's in his '70s now. But the man is very accomplished.