Hi friends. New mapper here in the triangle. I am located in Cary and that is where I have started to clean up the tiger data and upload new data. I’ll be spiraling out from Cary towards Raleigh and Durham until my interest drops off. 
I’ve found the Chatham+Wake county GIS download data to be quite useful and with a bit of work have started to upload some of the larger lakes (Wheeler, Harris). I may also use this for parks, although most of these look mapped in Cary at least. If you want to use any of the GIS data I can convert the shapefile data to gpx so it is more easy to deal with in JOSM. That took a bit of learning and about three software tools, but I seem to have a rapid process now whenever I need to convert stuff.
One of the big improvements I’m working on is to get the highways updated from “residential” to “tertiary” (yellow) or “secondary” (orange).
Drop me a PM if you are in the area and active.
Aaron