You say plug it and put a tube in it. I sure wouldn't do both. I think the choices are: (1) have a tire professional plug it or plug it yourself if you know how (it's simple), (2) either you or a tire professional remove the tire from the rim and patch it on the inside, or (3) break it down and put a tube in it. Personally, I'd just pull the nail out, put a plug in it, air it up, and go.