This time of year in zone 7 in SC, the bees have a very limited selection of plants to visit. The only native tree in bloom right now is the witch hazel, but it is a small shade-living tree bearing a relatively small number of flowers and there are none to be found growing on or near my property. But I have a large (20' high x 30' across) Eucalyptus neglecta growing on my property that is covered with 100's of blooms from mid Nov through New Years that is buzzing with bees on any day that is warm enough for bees to fly. Do you know of any other plants that are blooming now and are popular with honeybees?
In my neck of the woods (southern North Island NZ, maritime temperate) our best winter-flowering bee plants are the native koromiko (Hebe stricta) and tagasaste. The koromiko flowers profusely throughout June and well into July most years, and when it's done the tagasaste is starting to bloom. Both are heavy nectar producers and popular with honeybees and bumblebees as well as native pollinators. Not sure how hardy they'd be in SC but definitely worth a shot if you can source them.