yeah the springers are running now.  Are you going by boat?  The bank areas aren't the greatest on the Sol Duc.  To keep anything you need to be below the hatchery outlet creek which is a little walk from the parking lot.  There are some spots like under bridges or you hike in from one of the Rayonier gates.  They are also in the Quilayute and you can hike down from the park campground.