Combine them all. Remove the cover from the overwintered hive, lay a sheet of newspaper across the open hive, put a deep hive body on, transfer frames of bees from the other hives, shake bees from the other hives into the deep above the paper take the now empty equipment away so the field bees don't return to where they came from, reinstall the cover(s). Leave it alone for a week. The bees will sort things out and you should have a strong colony. If there are any queen cells the bees will tear them down.