This year I had my sights on the Secesh South Salmon combo and while flows/weather didn't cooperate for the Secesh. The South Salmon was oh so good...albeit quite a bit lower than the previous year we were in there at. If you're looking for a wilderness river in Idaho to do sans permit I would highly recommend the South Salmon, in fact having done it twice now I think I'm going to make it an annual pilgrimage.
Every trip to Idaho should include some time spent on a white sandy beach. Ideally you will also have access to a blender.
Running through Devils Creek 
They don't call it the whitewater state for nothing 
Yup, its good, its fun, and there have been rumors of a Bikini Creek hidden deep in Idaho's wilderness runs.
Boof clinic take 1 - Fall Creek Rapid and the end of the goodness 
A good forward stroke 
Boof clinic take 2 - I'm pretty sure this man might be the most bad ass human being I've meet in recent hishtory 
Paddlers in Idaho like long fast boats and usually aren't this color coordinated. 
If you venture to the SF you'll also get to enjoy a scenic ~20 mile paddle on the main and get to see a bit of this. 
If you venture to the SF you'll also be about 2hrs away from the best 15miles of kayaking in North America which no self respecting kayaker should drive away from. I heart the NF