I just harvest too early for my storage conditions. I assume things would go better if I grew long-season varieties and harvested in the fall.
The very earliest harvested (Viking Purple), I brought back upstairs, sat them in a shady corner of the deck, and let 'em cool down. Of course, that was about the end of September and plenty cool on that deck but not freezing under the deck roof.
The year I had 200# harvested and I carried them all down and up and down - ain't gonna do all that again! ... it does help and keeping the sprouts off helps.
I've got a bowl of chopped leeks for lunch, need to get down those stairs for 3 or 4 potatoes. Have a package of beef sausage in the fridge. Then, it's soup!
Steve