I originally didn't post an update here because there was nothing of new information based on what I wrote above (M-F 0400 call at Elizabeth City), but I made a visit to the C&A in late October. Both GP38s are now out of service and have been sold, leaving the GP7Us as the sole power for the line. This provides an opportunity for a rare matched consist on the line:
However, I am getting word this probably won't last much longer, as the C&A is likely to get some additional power soon. Just a heads up for anyone with this on their "to do" list...
EDIT: looks like the image may not have worked, use this link if you don't see the photo:
http://www.railpictures.net/viewphoto.php?id=382490