And maybe read the book by Bill Beer, and also George Whites account of swimming the Grand Canyon. Both of those people actually SWAM it, all holding onto dry bags I believe. George went on to be the first person to do commercial raft trips in the Grand Canyon. Very cold water down there comming out of the dam, so dry suite territory to be on a river board, most likely. Probably some insight in the story's of swimming it, about what it might like, and at least a good read if nothing else!
We can't always agree, but we can still be civil to each other.