Well yes, we've all spent the last 15 odd years crawling around in asbestos so it's one of those things where you just have to accept the risk for the experience I guess. By the time we were there there were so many other things to worry about. Wolves, getting caught, staying warm. Water quickly dropped down the priority list.Yeah, definitely the most worrying part! I guess though that enough people have done It this way now that we would know if they were drinking caesium!