Alot of people actually jig for Kokes in open water on Koocanusa. I have found that if you troll, you catch bigger fish than if you jig. Jigging gets more fish, but you are fighting alot of 7-8" little buggers to get one nice 10-12". I love using Apex Kokanee killers on that lake....FireNIce, Flame Orange, UV Orange, and UV Purple, Kavorkain all catch me fish, but the Flame Orange is the best producer. Tip with corn or maggots, in whatever flavors you want to try. Just be aware that there is a good chance you will hook up on a decent Bull Trout! I have caught the largest Bull I've ever caught while trolling kokanee gear!
Good Luck and maybe I'll see you up there.
Jeff