salmo_g's advice is perfect. Pick out some lakes on the map and start exploring. You can't go wrong. Even if you don't catch any fish you'll have still experienced the fabulous setting. Because low numbers of fish are used, and stocking is often infrequent, the quality of fishing in any given lake can vary greatly from year to year. That means guide books don't necessarily do you all that much good. To me, the most fun is had by exploring someplace I know nothing about. The Hi-Lakers and Trail Blazers are a couple organizations (full disclosure: I belong to both) that have websites dedicated to high lake fishing in Washington.