Last year on the gorge i decide to target kok's only, with advice from a friend. I fished on the south side of anvil draw. In the bays and around the bird island. On the west side of the gorge. I looked for water about 25 to 35 foot deep. Not by shore or a island, but more like in a more open area away from real structure. I did catch some. I watched my depth finder. Some times they came in like a big bait ball and some times only one. I jigged with a silver/blue doctor spoon 3/16 to 1/4 oz or kastmaster the same size, with no bait. My friend uses small lures also like pk, croc's or other small ones with or with out mealworms. I hope this helps you.