Looks mighty fine! That's very similar to what I grew up on and still make. And yep, a lot of the old-timer Piedmont/western NC bbq cooks added a little bit of mustard to that same basic recipe you gave. It ain't just a SC thing. It's firmly entrenched in many of the NC regional styles, too. there isn't any "one official" NC bbq, but all NC regional styles are very similar in the end.
...Half a yard full of crap to cook on like everybody else...
Just a hungry hillbilly lookin for a dead critter to cook
in one throwdown,