I have fished Yale alot yet mostly have done good after Memorial Day. I have done good by the dam and working the boat working towards the east after coming out the launch. I have found schools close, yet I tend to work the middle part of the lake. Have done very well with my usual Chrome Dodgers with pink and green hoochies. Gulp Maggots and DNA Kokanee Scent.
I put a small gang troll off of my downriggers and run back my set up about 5 feet off a stacker release from my downrigger cable and set it back about 10 ft.
Fishing Yale at this time i hit most of my fish from 30 to 40 ft down. The plankton bloom is generally pretty strong so you don't have to worry about spooking fish and having to set your rig back further. The koks are generally smaller than Merwin, yet the limit of 15 makes up for it!!! Good Luck out there and bring your camera, you can get some nice shots of Mt. Saint Helens in the back ground. 101chromefish101