Krome,

I've never fished the Yakima but I've fished the Wenatchee and Icicle rivers which flow into the Colombia about another 50 miles up stream. These fish aggressively hit the same things fish over here in the west side do. Vibrax spinners, spoons, drift gear etc. I fish spring chinook on the Icicle and use almost exclusively cut plug herring. 600 miles and 7 hydroelectric dams and these chromers absolutely hammer herring!!!