The thing about the alcohol is that, if you do it, you should do it right before you start shooting. Not the night before. Or do it right after cleaning but before oiling. If you're gonna leave it sit after the alcohol treatment, run a lubed patch to protect the bore.
Besides drying any moisture out of the barrel by evaporation, it will also dissolve any oil in the bore. If you remove all the oil and then let the gun sit overnight there will probably be some rust on the unprotected bare metal.
Whatever else you end up doing, be sure the bore, flash channel, and nipple are clean and dry before you load any powder. And load with the hammer at half-cock. She'll go off every time. :thumbsup: