All goldenrod is not equal. I believe we have a different type here in the heated South than you hear talk about in other cooler areas where the GR produces a steady flow. Here where I am we get a little nectar and some backfilling and it is hit and miss. Definitely not enough to sustain a hive.
As you know the diversity of forage in SC, for a small state, changes drastically from area to area. It changes drastically in my area just 30 miles toward that stinky bird town :) Actually the forage is better in the Batesburg area than here. I believe because of the shift from clay to more loam. You throw in my holly there, more privet and sparkleberry. They got twice the flow I did this year. Here I get basically blackberry, privet and tulip popular.