I'm up around that area during the summer. Should be fishing there during spring/summer for sure. I don't know exactly what to tell you in particular though, as I don't think I've ever fished it. You should also check out Helton Creek near Mouth of Wilson while you are up there. I don't know if you've ever fished that or not, but there are some good rainbows in there. Just keep driving past all the other fishermen you see out there. It's heavily fished, but most people stop at the first good looking hole they see. Be sure not to do that, there is too much pressure, just keep driving. Once you transition from gravel to pavement a few times, you should be good. Let me know how this goes for you, I would love some info.
Tight lines and good fishing
-CF