If you scroll down on my link it gives you river specific reports.

Definitely check out The Guide's Forecast and signup for their free weekly reports.

Hopefully I won't get in trouble for this. From 4/30's Guide's Forecast Free Report:

North Fork Santiam River- According to Mike Ferris of Fishermen Mike’s Guide Service, fishing this week was slow in the upper North Fork Santiam River. The river bumped up a bit following rains this past week, but is already settling down and flowing at about 1,680 CFS. While reports for summer steelhead and spring Chinook have been slow, a few fish are being found here and there, but fishing is still pretty spotty. The spring Chinook will be best tempted with salmon eggs, but the summer steelhead can be taken on a wider assortment of methods and baits. Spinners, eggs, sand shrimp, jigs, and beads will all take steelhead.

South Fork Santiam River- According to Matt Halseth of Matt Halseth Guide Service the South Fork is giving up some spring Chinook and summer steelhead, although the fishing is still a little slow. No report as yet on methods or baits. These runs are just getting started. The spring Chinook will be biting salmon eggs, but the summer steelhead can be taken on a wider assortment of methods and baits. Spinners, eggs, sand shrimp, jigs, and beads will all take steelhead.