My friend Leo and I headed up a large hill to the east of our camp site (and away from the smelly lake). As we got near the top of the hill we saw a fence with a warning sign. Thinking it might say something cool like "Warning: Here, there be Aliens" or something similar, we both headed for it. As it turned out, it read "Warning: Raw Sewage"... Ironically the area was empty and didn't smell at all. I figure it must have escaped to the lake.
We crossed these tracks on the way up the hill.