ATC as Map Source

An article proclaiming the joys of bushwhacking -- "Fill in the blanks on hiking maps; Off trail, plenty of adventure" by Tim Jones in the Concord (NH) Monitor of 17 October 2008 -- mentions the Appalachian Trail Conservancy and the Appalachian Mountain Club as possible sources for "recreation maps" that one could use to locate "blank spaces" that could stand a little off-trail exploring.