Wow, thank you SO much for all of these helpful responses!
Well, it's a couple weeks later and I've done my first experiment with this. My goal is to develop a way to travel or backpack for 4 to 7 days without refrigeration, without negatively affecting my health. In a few months, my husband and I will try our first backpacking trip in several years (since my diagnosis), aiming for just 4 days, 3 nights. So, I dehydrated all the sauerkraut I would normally eat in that span of time, plus a bit more--two large jars' worth. (I like Julia's idea of trying "young" sauerkraut--as I get better at fermenting my own, I'll be able to start doing that. For now, I'm dependent on store-bought...currently awaiting my first homemade crock batch.) I dehydrated at 105 degrees F, which took around 8 hours. I stored the dried kraut in a mason jar in a cool place, but not the fridge, reasoning that I wouldn't be able to store it in the fridge on the way to our backpacking trip. Then, after a few days, I substituted the dried sauerkraut for all the ferments I usually eat, discontinuing non-dry sauerkraut as well as goat
milk kefir and chickpea miso.
Well... I would say the results weren't perfect, but they were hopeful. My gut didn't do as well as it usually does on my normal ferments, but it also didn't do as poorly as it does without any ferments at all. The first day was actually the worst, possibly because my body was adjusting--I had some gut symptoms and felt a general malaise all day. By the third full day, though, I was feeling normal
energy, although my gut still wasn't normal. (I'm not getting too graphic here, out of politeness! :) ) It would have been rough going, if I had been backpacking that first day, since I was feeling off and tired. But the second and third days would have been fine.
I'll repeat this and see if I can tweak it, perhaps looking for younger kraut, and more carefully reading the links Judith sent. I love imagining those old-time settlers traveling with their
sourdough starters!!
I also need to do an experiment to verify that the dried kraut was doing something and had at least some probiotics--so I will try going completely off all ferments for four days, sometime, to make sure it's true that my gut did better on the dried kraut than it would have on nothing at all. (Whenever I do these experiments, I end them early if I feel my body being derailed into a disease flare-up--I'm pretty good at sensing when discomfort becomes dangerous.)
Thank you thank you!!