Last year was my first year fly fishing. I only fished the Tilton River outside Morton, WA using Orange Stimulator. I am hoping to expand where I fish and also to expand my fly collection to other than the orange stimulator; however, I am confused to whether I use caddis flies or mayflies. I don't want to go over board and purchase 50 different flies, but would like to get a starter of 3 to 5 types of flies I should get. When I do the research, it just too confusing as to what I should focus on for fishing in Washington rivers. Any suggestion would be great!