From what I recall (didn't read your link but familiar with this story), they all suffered from extreme hypothermia. When it gets bad enough, people start to hallucinate and will do crazy things and eventually (close to death) you get this warm feeling euphoria and begin taking off all your clothes. This explains the naked strewn bodies. I think there was something about a woman missing her tongue that could be explained as either being delirious and biting it off herself or an animal eating it after her death. That's about all I remember.
Based on the two links provided I could go along with this statement; However, it does not explain why there were high levels of radiation around the campsite.