I live in Northern Wisconsin and the current daytime high temperature has been about mid thirties. I am being told by locals that I should be feeding pollen patties and bee sugar/fonduant. This would require opening up the hive and placing the feed on frames above cluster. Can you do this with the temps in the mid thirties? It is also suggested I lift the top box to determine it's weight. Can you do this with temps in mid thirties? If the bees are in top box wouldn't they be disrupted if that box is lifted?