If you can find the sept. 6, 2007 issue of WASHINGTON FISHING&HUNTING NEWS, there is an article/map of the Maverick Saddle area. Looks like it's a little east of Fish Lake. That's where I would try if I lived in Wenatchee. I'm in Seattle, and haven't made it out there yet. One of these years, I would like to do some grouse hunting/bear scouting over there.
Good luck!