It's probably too late in the year to start a thorough desenitisation programme with a CD, since that takes a very long time, though it would probably be worth doing for next year.
I'd pop your dog on a lead when you take them out for a wee after dark - ours seem to find this reassuring, and it ensures they won't bolt back to the house before performing, if necessary. If you walk them in the evenings, then I'd keep them on lead to prevent bolting in fear, if a sudden random bang goes off.
Don't wait till Nov 4th to discuss with vet -
- see them now and discuss options, including a DAP diffuser. We have a whole selection of dog responses here - one who doesn't give a hoot, one who gets a bit wound up occasionally , and one who gets absolutely petrified. The one who gets petrified actually takes Valium on the three or four worse nights (and on NYE). We make sure we are in with her, that curtains are drawn early, soft music is playing (nothing too loud) and she has the option of either lurking upstairs, or on the sofa with us, or after we are in bed, she will often come to bed with us as she is so frightened. The Valium has been brilliant - it has helped a lot for the worst nights. The other thing to consider is actually taking them away if you live in an area which is very very noisy and spending the evening somewhere remote and quiet.
I've been reading about the Thundershirt, but remain to be convinced.