I saw both 630 and 722 a few times back in the 1970's on Southern Trips. Will have a video called "Southern Steam In The 1970's" ready soon. As for ET&WNC we have a segment with #12 to Cranberry in 1947 in a show releasing this fall. It is one portion of a NG variety show. At the end there is one shot of 204 backing from Elizabethton to Johnson City. Pretty rare stuff.
Now 630 is relegated to the TVRM and no mainline steam at all on the Norfolk Southern (Formerly Norfolk and Western, and Southern Railways before the merger, for those who do not know that)
Greg Scholl