Yep. They may go down deeper by the 4th. If the weather warms up like it should, then the kokes dive down to their comfort range. You typically will need downriggers, to get your gear down to them. They'll generally hold somewhere between 80' and 120' in hot weather.
Troll a small dodger, followed by a hoochie (squid imitation) in pink (or some variation of pink). Or, the old standby...flasher set (Ford Fender, Doc Shelton,etc) a wedding ring tipped w/ a piece of worm and tipped w/ 2 kernels of white corn. And it's important to use a snubber (usually between your flasher set/dodger and your spinner/bait).
You can also learn a lot, by reading the archived threads on here about Green Peter and the Kokanee fishing section. Good luck.