What it has: a well-loved stretch of the AT through "balds"--deforested highlands crenelated with granite pinnacles, from which you can see wave after wave of the Blue Ridge. Waterfalls. Insane amounts of rhododendrum (for which the natives appear to have more words than the Inuit are reputed to have for snow). Wild ponies -- they're what are keeping the balds bald. (If you were a horse crazy little girl in the 60s or 70s, you'll be psyched to hear they were imported from Asseteague, where Misty's from.)
The Mt. Rogers AT club has a lot of suggestions here: http://mratc.pbworks.com/w/page/3477611 ... nd%20Trips.
And I found this guy's trail notes--in conjunction with the Nat Geo Mt Rogers area map-- helpful, even though he uses words like "yellow" and "hour" differently from the way I would. This link goes to a Mt. Rogers backpack loop: http://www.midatlantichikes.com/mountrogersbp.htm . He also has two Grayson Highlands Loops, both of which I did, tacking a detour to Mt Rogers on to one. Each would be nice short backpack trips.
Anywhere, there it is. I'm a long way from an expert, but I'm glad to try to answer/redirect questions.
(I'm going to try to insert some low quality photos.)