I didn't really check out the cause of the problem when I was there before because I was so upset, so I opened the hive on this visit and brought the boxes back home. Clearly the hive had been robbed out, and left so weakened that the small hive beetle took advantage of the opportunity.
The other hive was almost completely covered with weeds. It was totally in the shade and had kudzu and other brambles all over the entry. I didn't take a before picture, but I wish I had. The bees were still flying happily in and out of the hive. I knew this vegetation situation was likely so I brought my hedge clippers with me. I went to work and freed the hive from most of the vegetation.
When I opened it, I was shocked (in all the previous shade) to find that I only saw one small hive beetle in the hive. Perhaps they were all satiated on the frames from the other hive?
This hive has honey in all three boxes and brood in the bottom box. I really wanted to taste their honey. The top box is likely sourwood, but they had not completely capped the honey in those frames, so I brought back a frame from the middle box.
I didn't come prepared for harvest transport, so after brushing off the bees, I put the frame into a pillow case (I'm now using them for hive drapes like Julia taught me), and brought it back to Atlanta. I crushed and strained it and now have three pounds of luscious grape-flavored honey, likely from the kudzu all around the creek bed where the hive is located!
(The HIDDEN honey frame).