I'd have to agree with Doug. I am sure that some type of permit will be necessary. There are many projects on going which you may be unaware of in any particular stream...for instance spawning surveys count carcasses. If you were to dump fish into these rivers and streams you would be interferring with the studies. I think it would be better to volunteer your services to the state hatchery personel...I am sure that there are projects out there that need some volunteer help. Good Luck!