Staging Silvers

#1
So I have a little spot that I fish each year around this time and every year it is the same thing - some times I catch them and some times I don't. It's amazing to me that I don't catch a lot of fish when I am surrounded by several hundred fish. I think my best day ever was about 12 or 13.

Yesterday I caught 3, today there were twice as many fish and I did not touch one. I went thru almost every fly in my box tonight trying to get them to bite.

Any advice on techniques or flies to try and get them to bite?

Here is a short clip of the fish swimming by:

 
#3
I hooked a fish this morning that I'm pretty sure was a small silver, and definitely of the staging variety. He took a size 6 soft hackle type fly I tie for chums. Pretty sparse.

I think when they get to that point just being there when that switch goes off that makes a few fish turn into biters is probably just as important as the magic fly.
 
#4
BTW... you didn't happen to go into the fly shop in Poulsbo yesterday did you? Your picture looks like a guy I saw at the shop yesterday asking Bill similar questions.
 
#7
We are fishing for staging coho on Van Isle as we speak. Very small sparse flies. Vary your retrieve. I have been using size 8's very sparsly dressed. I know some of the guys are going as small as 14's. Neils in varying colours.