In the Spring time bass, carp and planted trout are in Freeway lakes.
Winter streelhead will start showing up in the NF Alsea River mid December.
Siletz River and Siuslaw River are also good places to start for Steelhead but I think they are more January and Febuary.
Spring and summer can be a great time on the santiams, try PMing kodiak as i know he knows a lot about the santiams.
If you dont mind traveling the Umpqua system is a paradise almost year around.
RB