My head canon for them dealt mostly with what happened to them after the raids on the Inner Sphere. As for the Wolverin origin story, it always felt a little off to me. Maybe that is what the writers were going for, part of the story had always been that the Clans history had been rewritten.
Now I wonder, do the Snow Ravens remember the truth? Their saKhan Joyce Merrell lived at least a few years after her official date of death. Maybe this is one of the unspoken reasons for the fleet, so the can leave if they need to.