is aylett va to far north for cnbg.
I think you are probably a just little too far north and west for CNBG. You are certainly on the border. They might do OK, but they also might not. If you were 50 miles east, and or 50 miles south, you might have a better chance.
With that said -- give them a try. They aren't very expensive. They might do well.
Travis (CJBS) might have a better idea. He is just north of you. I'm a little more than 100 miles northwest of you in the mountains, and I don't believe they would work for me.