Ziljoe
Google autotranslate :).
In short, in reports where imported equipment is mentioned, this equipment is given a high rating, compared to domestic.
The term "cold overnight stay" was quite vague. That is, such an overnight stay was considered to be an overnight stay outside a populated area in a tent with a stove, in a tent without a stove, under a canopy/awning with a fire like a trapper's...
ahabmyth
In fact, tourists sewed sleeping bags (colloquially called sleeping bags "спальники") from blankets. So tourists could sew sleeping bags from wool blankets, and then rip out the threads and return the blankets to their original appearance. Especially if the blankets were not theirs, but government-issued.
According to the materials of the criminal case, there was no firewood in the stove. But the searchers in their memoirs mentioned firewood in the stove. Another thing is that in those days there were no stoves that could work for 5-6 hours on one load of firewood. Maximum - one hour.