Remember; you are going to be on a boat, so please wear layers as the weather can and does change very rapidly in the sound. I have gone from a T-shirt to jacket in the sound within minutes.
Plan ahead, layers are the best.
Hat, light gloves, rain gear (you never can tell) and a light jacket.
Don’t forget good shoes or rubber boots. You are fishing on a boat after all, so no hip waders needed, boots work great.