Brad's 1/0 is adequate enough for what you are trying to do. You are fishing the North river at a really poor time of the year below Winchester....almost no fish moving through at this point in the season, very few fall chinook and the steelhead run is almost over for the season. There will be fish in the when the coho arrive....which might be a while, they are running late this fall!
You need to drop down and fish the main Umpqua, 1oz slip floats and you 1/0 hooks, roe and you'll have a decent chance! Time of day is everything right now! Rain coming next week, things are going to change then and the bite will pick up....the problem is there are already tons of dark fall chinook now! Lot's of them will actively be spawning in the main in another 2 weeks or so. Bright colored wigglewart's will catch some chinook and lot's of coho as well.
Good luck!