Just dug up the second of my 8 rows of spuds, I told you I liked them !
My rows are only 3 meters long which makes for ease of handling and portions the workload somewhat, but most importantly: a single insect net covers an entire row, so there is almost no problem with the beetles. So, in a 3 meter row I planted 10 small spuds with a total weight of about 1/2 kg and I harvested something over 10 kg's of spuds, that's 20 times more than I put into the ground, in just 100 days.
Covering the rows not only keeps the beetles away but allows me to protect them from too much rain, frost and even heat / sunburn etc.. Cost is of course a factor but the nets last a couple of years and can then be used as insulation during the winter.
To date I have not yet dug my potato bunker, one day, one day, God willing. So I leave my late potatoes in the ground, flatten the leaves and stalks and cover them with an old carpet, insect nets, cardboard, what ever is available and then cover it all with black plastic. This keeps off the rain and snow and, as the ground is almost dry, prevents 99% of the frost damage.
You may also find seed pods on the plants, try to remove them from the ground or they will give you an unexpected crop. This might sound nice but you will not know what you have as the seed pods contain all of the DNA of all spud sorts ever found and they remix their DNA every year by crossing with other plants. It's fun to see what comes, but do this on a separate patch if you want to know what you are eating. A spud that grows from a spud is a clone of its mother spud and so has identical characteristics. A spud from a seed is experimental and you never know what you are getting. It takes breeders about ten years to develop a new sort and get it ready for marketing.
Having harvested all my spuds for this year I keep just two of each sort and replant them all in one row, with a little luck and some clever use of nets, insulation and sheeting they produce a very late crop, but they are not for eating ! These are my seed potatoes for next year. In early April I dig them up, put them in egg-trays and let them sprout before planting out according to the local weather. Again, by careful use of nets, insulation and sheeting you can ward off heat, wet and cold. Spuds like it: mildly damp, warm and dark and a good portion of compost or ripe manure, a bit like mushrooms.
This somehow reminds me of my time in the army, often ... kept in the dark and fed on shit