I've heard pink works well. Or you could try a couple colors together in a yarn ball. Put that yarn ball in an egg loop with a corky or 2. And you'll be in business.
Its a little big. But you get the idea..
If that doesn't pan out, you could try drifting a steelhead jig under a float. I've had luck with an orange and white one and with an all pink.
As far as bobbers go. I personally prefer pointed balsa floats. They're easier than a plastic spherical bobber to rig and change depth with. And the point on the top lets you know what's going on under the water. Hope this helps.
Happy Fishing,
Kyle..