How do you fish for these things and what do you do with them?
Up by bonneville, you can drift fish for them off the bank. Basically a steelhead drift setup but tie on a shad dart. You lose a lot of gear in the rocks so these can get expensive. You can also use a small corky and tiny chunk of yarn with like a #4 or #6 hook. Much cheaper and just as effective.
Fishing out of a boat, I like to run dick nites. Fish them with about an 18-24" dropper and a 3' leader.
I don't fish for them very often, but guys use them for oversize sturgeon bait and crab/shrimp bait.