I know that this isn't exactly UL because it uses a thermos not to mention that it takes a little time and planning...
However, I feel compelled to ask... have you ever done it... made yogurt on the trail? Just wondering if there was anyone out here as crazy about fresh yogurt as I am...
We do this on some of our 10 day trips . Shocking, I know, but there are also 3 of us so the added weight of the thermos isn't really a big deal.