The gray man. Nighttime Camouflage

At Home, On the Move
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37. If things are really bad, move at night to avoid being seen. Keep to the shadows as much as possible.
38. Keep the noise down. It is likely to be quieter at night and sound carries, even in the city.
39. No fire! Use a JetBoil type of system instead of building a fire to avoid extra light exposure.
40. Avoid smells. Cooking food will create smells that will attract people. Use water to rehydrate freeze-dried foods or simply eat your meals cold if necessary.

And Above all...

41. Know when to go from being the gray man to not being noticed at all, to not existing. After all, there may come a time when being “one of the crowd” might not be to your advantage. Maybe they are being attacked or reigned in by the military.
41 Essential Rules to Become the Gray Man, Roman Zrazhevskiy

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Серый человек. Камуфляж в ночное время