Sorry for the late response, just seeing this now.
All of the above is germane. Just wanted to add a little perspective from someone who has been where you are thinking of going... Granted, NC may be less restrictive than other states, but in my experience, it may be not worth it to go to a lot of trouble just to hobby haul: get the CDL (and the DOT physical, which isn't a problem for me but I'm in good shape, not overweight and I manage my blood pressure -- if you have issues with any of those, DOT physical is going to be ... interesting), get the proper commercial insurance, get the proper commercial/combination registration (and in my state, commercial vehicle registration and insurance is $$$$$$$$$$$$$$$$$$$), get the truck able to pass (and maintain the ability to pass) the DOT inspection, set up the DOT number (and all the drug testing and maintenance reporting thereunto pertaining -- Ken can tell you more), make sure the truck marking is DOT compliant, set up the LLC (And holy crap, if you think any of the previous was a PITA, wait till you do the LLC ...

)... And this is all in addition to taking care of the Jay Oh Bee that actually pays the bills ... Speaking of bills, can you do all your own maintenance? If not, say good bye to any profit you've made so far. Oh, did anyone mention tires??
Bottom line: If you are wanting to have fun with your old truck by trying to make a little money with it ... Stop now. It is a huge, ginormous PITA.
My hat is off to the Crenwelges and others who run their own companies doing OTR/LTL hauling. But it's one of those things where if you don't go all in, you just need to consider staying home.
Also something to consider --- Take a look around and check out just how many vintage trucks (say, older than 1990) are still on the job (legally). There's a/several very good reasons for that.
Whatever you decide, good luck! Have fun with the truck.