Hi Mark
By February the Wilson should have a good amount of fish present. Nearby is the Trask and Kilchis rivers. Both of these rivers will be in full swing too. The Wilson will have brats and also a fair amount of natives present.
Closer to Portland there is the Sandy and Clackamas. The lower Sandy is bank friendly and has several miles of fishable water.
Here is some contact information for the latest fish reports, bait, etc.
Guide Shop 503-842-3474
http://www.guideshop.com/http://www.jackssnackandtackle.com/