-- Last Updated: Oct-23-12 8:46 AM EST --
on the top menu bar - "Go Paddling", drop down menu has Places to Paddle, and Water Trails, and other stuff. did you look there?
a bit of a problem is the "5 to 9 days" - you pretty much have to go to some place like adirondacks or BWCA for a longish 9 day trip, though there are other possibilities - The Allagash in Maine is one - add the St John if the water is high enough.
most of the western river trips tend to be 2 or 3 day trips and many have quotas, so by permit via lottery only; several river trips in Nebraska, but not for a 9 day trip - there's always the Missouri; Smith River in Montana (another permitted/lottery)?
kind of silly to recommend a "new" place for you to go when no one knows where you have already gone, aint it?