Re: single brood boxes
I talked to a large beekeeper from Canada two years ago at the AHPA convention. He runs 5,000 hives all in singles. Runs excluders above the single deep and they go right through without problems. In the fall he feeds them syrup until they're pretty much honey bound so they have enough stores to make it through winter. He overwinters in Canada and they make it. I thought about giving it a try but since I go to the almonds and my grower prefers two boxes I've never done it. Let us know how it goes if you try it.
Bliss Honey and bee supplies