They can be aggressive when the bite is on. I was out today with two other guys in a boat and we only caught one fish. We did not see very many fish caught either. On the other hand, my buddy fished from the bank and caught four silvers and even a couple of kings (release all chinook). I was not kidding when I say the river is flooded with fish.
Hopefully I will do better tomorrow. I am leaving the boat behind and fishing from the shore.