Here's another trip I did with Jason Geck and Gordy Vernon a few years back over Memorial Day Weekend (2005). It's in the Talkeetnas and starts on the Willow side of Independence Pass. Three days was too fast. Five might be too slow. I have passed this route on to others but all of them have ended up floating out the Kashwitna instead of hiking over the mountains to access the Sheep Creek run, which is classic packrafting whitewater.