Charlie Nickens BBQ in Nashville

I don't know a thing about this place except the few years I lived in TN, people talked as if it was the best in the world. My MIL is coming down in a few months and it was one of her favorite places. What folks call Q up there is something much different then what was Q down here. What was the sauce like? Is there anything similar in a recipe or regional type that it was similar to?

Charlie Nicken's is long gone and probably so are his recipes.
They're number 51 on the attached list of Nashville Memories.
 http://nashlinks.com/remember.htm