Don't be scared to try anything a smallmouth would eat. Don't just use an inline spinner and go home, if it's not working try spoons, rapalas, small crank baits, or 3" grub baits like twister tails my favorite is a *********** grub. All these baits have the potential to catch you your first steelhead on hardware. I'm not sure what you have been trying but give these a shot and vary retrieve speeds. Colder water means slow it down a bit because the baitfish will be moving slower. Good luck