JW,
Wow, I think you've hit a couple of bullseyes. First, I didn't realize they had found my wife's old record collection. We probably have that on CD as well.
But the quantity is a key thought. OK, up north a hive needs 2 deeps full to make it through a typical winter. Down here the 'rule of thumb' is to give them 3 supers, or a deep and a super full going into winter. If I break it down, Sept/Oct was when everything stopped & they began living off their stores. This will continue into March/April when nectar flow exceeds consumption. Call that 6 months. Let me break that into 2 supers full of honey/pollen (leave 1 for brood). Let me round that to about 150 lbs of food stores.
That's a bit high, the 'rule of thumb' here is closer to 70 lbs of honey. They do find some food over that time, but let me split the difference: 100 lbs. OK, easier math. At this point I'm 1/2 way through 'winter', so 50 lbs are already gone, so they need maybe 50 lbs. That works out to roughly one full medium 10 frame. And I'd put that at 80% honey/ 20% pollen. So roughly 8 frames of honey & 2 more of pollen. For those splitting they might need a little more, for those not maybe a bit less.
So maybe I'm answering my own question. Some of my hives are fat & getting fatter (just like their daddy, I'm so proud! Cough cough). Some will need a little more help. The new colonies will need more pollen. I'll see how individual hive feeding will go but know some robbing will be an issue (so I'll likely do a public feeder an hour before the individual feeding).
Yes, that Carpenter's song sounds perfect.
All that's left is to look at pollen for an early ramp-up for splits. If I have 4 weeks of feeding pollen, maybe a cup a day for the next 2 weeks, then 2 cups/day for the next two? That's for public feeding, a little more for hives needing help. At least it's a starting point. "We've only just begun"... Many thanks to all those who contributed here.