John I have 60 hives so maybe I can help. Bees often die because they can not move to honey because they cluster and then it gets colder and they have to pull cluster together tighter and pull away from honey. The honey may only be 3 inches away but they won't be able to move to it until it warms up so they slowly run out of energy. What helps bees in winter is to periodically to have a day warm enough to break cluster and move and a chance to leave hive to use the bathroom because they won't defecate inside. No it will not hurt to go inside if you need to when they have broken cluster on a warm day and yes it is fine to add frames of honey or to move frames around just don't put any eggs on the outside. If they are low on honey a simple candy recipe could help as a backup in fact I add candy to every hive in the fall as insurance. Recipe, I mix with drill in 5 gallon bucket
25 pounds of sugar
1 quart of apple cider vinegar
3 table spoons honey bee healthy
2 table spoons of citric acid
This be enough for like 4 or 5 hives and would help an entire yard if divided equally. Put spacer box on top and put candy on layer on newspaper above frames, it will harden into candy. I know many bee keepers that spin out all honey in fall and then force bees to cluster on candy and not honey and then they can add all winter and they know bees will not be removed from food. I am not that brave but I do put in as back up food. Good luck