Okay, managed to get out there yesterday morning (July 7) and give them another box. I was looking through a few frames to check for good brood pattern and actually saw the queen! It was the first time I've seen a queen in real life (honeybee anyway.)
I took one of their frames of capped brood to give a boost to the hive that had lost its queen earlier. I was hoping to see that the queen had started laying by now and she had. Yay again. It was the same feeling I got when I first started gardening and my seeds actually sprouted. Such a shock to see how nature works if you let it.
Now if we can figure out how to get rid of squash bugs easily.