Not to be a downer on your vision of good times and edible fish from the pier, but I used to spend a lot of time fishing Puget Sound piers, and that was quite awhile ago when it would have been even better. What I see happening at the piers is the opportunity to maybe hook up with a pink salmon that is coming through in a school (of course that is every other year and during their run) OR maybe another lone silver or other salmon if your VERY lucky. Mostly from the piers it is sculpin or maybe a ratfish. There are endless flounder to catch in Puget Sound, and this could happen at the pier, but it is more a guarantee if you had even the simplest boat, and anchored yourself anywhere away from the pier in like 50' of water. If u don't have even a simple boat option, I would find anyone of the beaches from the various public parks....cast out shrimp, or clam meat from shore. Point being that it always has felt to me, like the piers have fished out their bottom fish populations. Most importanly though, the bottom fishing regulations have tightened down to what feels like strangulation after many years of lack of control. This means all your rockfish, true cod,lingcod, other cod, etc.
But like I said, if you hit beach there is a buttus loadus of flounder to be had. Just be sure to hold them up to the light for a quick tumor and parasite inspection. Also remember that u need to be barbless in the Sound. I got checked about two weeks ago, and it was howling wind and rain.
Come back and let us know how you do.