I too recently made my first trip out to the coastal rivers. There are several good spots to fish from the bank on the Hoh and Sol Duc. What I did was buy a county map and looked for any roads near the rivers and just explored. Yup I did as much driving as fishing, but next time I make the trip out I will know a couple good spots. There are several good access points to the Sol Duc off the road going to La Push and a few miles south of where 101 crosses the Hoh I found a spot where the drift boats were taking out that has some sweet spots. The others are right you need to just go and explore, but buy a decent map that shows as much detail as possible. Let us know how you did. Good luck.