Long story short, lost one of my two hives over the winter and looking to spit the remaining (much stronger/productive/friendly) hive. The remaining hive is 2 full deeps and half a medium, with lots of honey, pollen, eggs, larvea, capped brood, and looking like they're thinking of swarming (one queen cup last week, almost a dozen today), so seems a good candidate for splitting. I ordered a queen for the new split, and it quite unexpectedly arrived today. No biggie, as it's a beautiful day and I had time this afternoon to play with the bees.
Trouble is, I can't for the life of me find the old queen. She's definitely in there as there's fresh, standing eggs (straight up, single egg, bottom of the cell, so not laying worker), but even 3 times through each box (putting the inspected frames into an empty super to keep her from being sneaky) I can't find her.
So where I'm at now is that I split the stores and brood fairly equally between the two hives, gave each a new deep with a couple drawn frames (the rest undrawn) and one the mostly-drawn medium. No idea which one to give the new queen to, and no idea if she'll last long enough to wait to see which hive continues having eggs laid.
BTW, it's 5pm here now with rain tomorrow, which complicates things a bit. Or at least will make for unhappy bees if I go poking yet again....