I have one 5 frame Deep NUC 40% brood, 60% honey/pollen mix with a 5 frame Medium on top about 80% filled with honey. Another one in a different yard about in a similar situation. For Winter should I put another Medium on top and feed them till it is full as well? And more importantly, since the NUCs have just migratory covers on them what should I do for ventilation and feeding? Since I am out of hardware for any of those options and don't have much time, want to know what would be best to spend what time I have building or break down and buy.