I went to one a year or two ago at the same spot. It was pretty good, since I'm still quite the beginner. The one I went to, the guy went over different gear he likes to use for different conditions and such. Some of it is basic info, but for a guy like me, it turned out to be really helpful. Don't expect to get the "answers" to catching steelhead left and right, but do expect to learn some techniques that are proven, and some other good advice.
You can also ask questions at the end, so you can ask some specifics that you think might help you..
Yes, all-in-all, I found it really helpful and worth my time!!