At this point, I'd let the QC's hatch and check in two weeks to see if she mated and is laying. Hopefully there's still some drones around up north where you are; I suppose so. If she's not laying, you may need to dispatch her and consider combining them with a strong hive. If at anytime you start seeing multiple eggs in cells, you're queenless hive developed a Laying Worker; Watch out for that. If the queens hatch without issue this won't likely happen so long as the reigning queen mates and starts laying, getting brood pheromone going in the hive. However, that seems to be the unknown variable at the moment with you being up in Pennsylvania where it's cooling down. Keep us posted.