Boone's Fork is a waste unless you push the limits and slip in near the private section that is maintained by a guiding outfit that has some tank pigs.
Like Jim said, fish the pisgah or small streams off parkway, expect low levels right now, we are in need of rain and thankfully getting it at the moment. All you need right now are elk hair caddis and stimis...if they spooky, drop a size and go ninja.
Maps? National Geographic has an awesome map labeled "Mt Mitchell/Linville Gorge" on the front but it covers most of the pisgah area outside of Boone with detailed hiking paths. The forestry service also just printed a new "wilson creek" area map that's pretty good.
Just hunt for wild streams, and ignore all hatchery streams right now...if stockers are your thing...