The secret may be the Kennebecs. This started because I wanted to save seed til next spring to save money, but it morphed into overall potato storage. I have for early season red Norlund and Purple Viking, mid season Satina that the Maine Potato Lady Reccomended, and late season Red Pontiac which I love. I will experiment with leaving a few of all of those, but I'm going to put the bulk of my seed potatoes in my garage refrigerator crisper. It should hold enough if the seed potatoes are egg size.
And I just came up from the garden after finding a place to put the Kennebecs that I think I can source locally. They are late season and with Bees comment about the thick skins, I think they will work best. My uncle also Reccomended them. I am almost positive that's what my grandparents grew and I can promise you that they never bought any seed of any kind! So they obviously figured out some way to hold them over and I never saw any kind of root cellar, so I bet they just left them in the ground, but they could have traded with other farmers.
Only thing is I remember eating green beans with fatback and new RED potatoes steamed on top. So how did they keep the red ones. Their refrigerator was probably a third the size of mine and I have two. Guess I need to go talk to my 95 year old uncle tomorrow, he'll know and I'll pass his wisdom on to you guys. I love the Internet, but sometimes you need that knowledge passed down from your forefathers!
Thanks Bee!