Minus Springers in Coastal streams, yes, fish are in every river right now. And yes, ver spread out. You are going to be targeting one, to three or five fish travelling together at most. So be prepared to move about to find some fish. Don't sit around and wait for 'em.
In the heads of most riffles in almost every stream around. They are not here in force, yet, but they have arrived. They normally sneak up with the final push of Winters. They are already up very high in the system I fsh primarily.
Majority of the Winters in the system right now, have darkening pectoral fins, while every single 2-3 pound Steelhead I have hooked in riffles since Early March has had very clear fins. The shape, size, and color deviations are all a little different species to species, and with more experience you will be able to spot Summers huddled up to Winters in a pool. But the dead give away is the fight. Summers run at you, and then all over over the place. Winters fight like big trout. Aggressive, but lazy at the same time. Also Winters are generally a bit larger than Summers. But in the Clack, the mint bright, black, and white fish are Summers. The Winters are blushin out a hair, and have dark spots developing around their face, and fins.
I would imagine that due to the heavy rains expected Sunday and Monday conditions aren't going to be to great anywhere. From what I hear we are in for a good soaking on Sunday. It's still possible to catch fish but it becomes much more challenging! I would try the upper Wilson if you can get to it.