I know completing the EE removes the walls, and I know not picking up a shards removes the walls, and I've done it solo before.
I'll try running around the outer edge but it's not 100% safe, i'll take your advice about waiting for the walls to come down before moving through them. I've found that as long as other teammates are at least alive and not in Crazy Place it's drastically easier to run in CP. it's when they go down that problems show, and I like the ice area more than wind, I think it's bigger and more merciful. but you can still get cut off. I was just hoping that maybe I missed something useful