In some places, like Scandinavia, you can camp pretty much anywhere you like as long as it's only for one night and you don't leave a mess.
The freedom to roam, or everyman's right is the general public's right to access certain public or privately owned land for recreation and exercise. The right is sometimes called the right of public access to the wilderness or the right to roam.
From Wikipedia - Freedom to roam
Is this also the case in Russia?