Us canadians have fished pink worms for a long time so try the following because it works for us:
fish it on a leader that is only 18" from your sinker. Any steelhead that can see this and wants it will move a little to bite it. You should also try rigging it "upside down" with the hook at the head and the line coming out about 2/3rd's the way up. Steelhead seem to go for the fattest part of the worm more than the skinny tail part. If you fish a river that is "tea" colored, try using worm that are a pink color heading towards white. They seem to show up really well and fish love them. Another thing about worms is they seem to work better & better later into the season.