Last month we had a day where the temp was up in the low 70s. I made a quick inspection of two hives and stood outside the entrance of the other two for a while, watching the bees come and go. The two I inspected looked happy and healthy. They were still well-stocked with honey and had already collected a good supply of nectar and pollen. The foragers I saw at the other hives were busy and purposeful; they looked like bugs on a mission.
I liked what I saw that day. But Winter is not over. So to not jinx myself I'll just say that I am cautiously optimistic about still having four hives when Spring comes.