P.S. Here's a guy on Boatertalk who did a high-water trip,
and the OCers and some kayakers were too scared to stay in their boats
during Impassible Canyon!

http://boatertalk.com/forum/BoaterTalk/901609

Here's the part I like: "Devils Rock was a pourover tossing trees around
like toothpicks. The horizon line was obscured by the [muddy water].
My first clue was when I saw a tree trunk go vertical."