Mizzle, first off on the river you will be using flies as other techniques are frowned upon like J-Plugs.
I would personally go out and buy a 9' noodle rod and spinning reel if you don't fly fish. You can get set up up there at either Whitakers, Salmon River Sports Shop, or other fly shops like Fat Nancy's but I tend to stick with Whitakers, Salmon River Sports Shop and another fly shop who's name seems to be eluding me but it is located just across the street from Fat Nancy's.
If you go to Salmon River Sports Shop tell "Button" (Jim), Russ from Brooklyn sent ya in and he will take care of you. He is a super nice guy and will help you out with anything you need.
Now when fishing the river with either flies or egg sacks you want to have a 4 foot leader maximum from your split shots.
For salmon the flies I use are egg sucking leaches, glo-bugs and estaz flies in salmon orange, black, pink, lt blue, and red.
I will be up there in about 3 weeks and will let you know what the situation is up there.
Hope that helps!
Oh and good luck catch them up. Once you hook one King you will be hooked for life! I am, and I am counting the days for when it's time to go steelhead fishing!