I don't know if these flies would work for your ocean dwelling salmon, but they are the standard when it comes to flies in the Great Lakes. I don't know how to put pics into a post but here are some links that show what I'm talking about. We will fish these with a leader length of between 18-36" depending on the mood of the fish. Hopefully this will help a bit.

www.howiestackle.com

http://www.laketackle.com/mall/menu_pages/flys.htm