Hi Bob,
I have been doing searches for Yellow Bullhead Catfish thinking I might stumble onto something for you, but with no success. But I had a couple of thoughts. Pay ponds throughout the mid west use to stock heavily with catfish. If you can find any in Washington you might call the owners go there and watch what the people are catching and if you find any with Yellow Bullheads, you could buy them. The other thing you might do is to find a couple of conservation clubs in your area and print out flyers with a picture of the Yellow Bullhead and offer money for any that are caught for you. You also could put posters at different lake boat ramps with your telephone number in case they caught any to sell you. I once paid kids to catch crawfish for me.
John
