It stinks, I'm with you, I got no Fall harvest either because of the drought here. Most of them have enough honey for the winter so it could definately be worse. I only have a 3 hives to feed a little and the other 12 are okay. I did have one of my nucs go queenless recently and found it too late to restart so I combined it with a hive that had just requeened itself and was needing a boost. Sounds like you had a swarm in your strong hive. If you've got a laying queen in there combine it with your drone hive (scratch all of the capped and uncapped drone brood for removal) to give them a boost. Better to lose one now than both in the winter.