Having him be low with less than 2 packs at this time would work, since he probably goes through about a pack a day. And if the convenience store isn't hit up until after the food first was, he could just plan on getting some that night after the 'rush' to the store died down. Missing his chance to restock.
Yet having a almost the whole day be 'night' would likely drain his supply by Wed and leaving him in a pretty bad state when 'night' hits again Thursday.