Downieville is the SERIOUS IV+ paradise!!! Be sure to check out Pauley Creek and Sierra City to Downieville run on the Yuba.
My close friend owns the Downieville Inn and is seriously boater friendly. Hell he might even get in there with you, but the key to staying with him is the free and custom shuttle service that he offers. Usually with cold ones at the takeout!
There are endless runs within an hour of DV for any skill level and they tend to go off mid april. That is when we do our annual pilgramige
His name is Aaron Fabish www.downievilleinn.com
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body. But rather...To skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming... WOW !!!! What a ride!!!!!!"