Thank you, glargg, for providing the simplest and most effective answer.
I've started so many characters that, at this point, my characters usually "set aside" the first four cheap wines they run across, if there's any chance at all that they'll ever do that quest. There are a couple of bottles very close to the end of the tutorial dungeon, guarded only by a few mudcrabs.
Like you, I use the "bag of holding" mod, so those characters who acquire that bag will just throw a few cheap wines in there "for later."