Two winters ago my honey bees died. Last year I did nothing to the hive at all, didn't even clean the inside. This spring my personal life has settled down again and I went to clean the hive and found that it is busy and vibrant - wild bees have moved in. (Well, I'm guessing they're wild.)
This morning I noticed that some had swarmed, so the hive must be doing well. My question is: is it worthwhile adding a super to gather honey? Is there some gotcha that I'm not aware of?