I think that your idea of presenting the two together is an excellent one.
I saw a Gedney retrospective a few years ago at MOMA in San Francisco, and felt that he certainly made extensive coverage of his material, but there is no depth to it. Adams, on the other hand, judging from the DVD of his work, digs deeply into his somewhat banal subject matter, but there is a definite paucity of the breadth of his coverage (thanks in part to his method of working with the view camera). Neither of these men present a very honest picture of the people of Appalachia.