I'm no expert on the rivers or bays in that area. But, I'd say that you'll be there far too early for Salmon or steelhead or for Blue Backs (sea run cutts). Salmon and/ or Blue Back fishing won't start up until August or so. And steelhead are well after that.
You're best bet may be to target trout in the Necanicum or Nehalem (main stem). But, I'll defer to others for more information. And do check the regs...some parts of the Nehalem are Artificial Lures and Flies only.