Steelhed -
In those deep pools that don't have too many snags on the bottom, I like to take off the float completely and cast and retreive the jig like I was bass fishing (kind of slowly bouncing it along the bottom back to me).

While i've yet to score on a steelie this way (yet!!), I've had great success with salmon - especially when tipped with a little prawn meat. Just don't do this if the fish are REALLy stacked up, because you may snag them.

Another thing to try is using a slip bobber. (let me know if you need info on how to rig it)
This will allow you to fish your jig 10, 20, 30, or whatever depth you want (and still cast with no problems). If you can see those fish milling about, try to adjust your bobber so that it is about 6 inches above their faces. If the water is really clear, use very small jigs in black or maybe more natural colors. There is an orange/brown pattern (crawfish) that should work well.