there is an interesting article on Coasters in the latest TROUT issue (the TU publication). There are some beautiful pictures of a this tremendous species. What a great thing if we restored that fishery - Steelhead size brookies!
The UP of Michigan is a good place to start for native brookie streams. Most of the LP (and midwest in general-from my limited knowledge) is all browns, rainbows, and re-introduced brookies.