Hi Ronmaitra,
Welcome to Fishingreminder and welcome to fishing !
I don't know a lot about salmon. But I would have thought what you are trying is OK. Worms, shallow diving lures, maybe poppers and I would definitely try spoon lures. Yes, I know you were using those for bass, but I don't see why you couldn't target salmon the same way. Maybe someone with greater knowledge than I might help with some tips.
Yes, boat traffic does affect fishing. Some local knowledge is what you need. Since I have never been there I don't know. But someone here might have some local knowledge.
I can help you out though...I will have a couple of beers for you just to keep your heart pumping. I will do that shortly for you so just hang in there...
itsaboat mate...Life is just a boat and then ya marry one !