once the four lower dams on the klamath river are finally removed..what types of fish will use the wood river to spawn in..?

The same ones that are currently living and spawning there.  I think it is unlikely in your lifetime that you'd see andromous fish migrating that far upriver to spawn after so many years of being blocked off by the dams.  It'll take many generations of fish, migrating to spawn just a little further up the Klamath each time. 

Dam removal talks have stalled again, so "finally" might be a while.  Also, the Keno Dam isn't one of the 4 being discussed.  It provides a significant obstacle, fish ladders work well but are certainly not perfect.

The river will be teeming with silverfish.