There are almost no burning tours around Russia (buses and any other). Even buying a tour almost on the day of departure (it's easy, considering that you do not need a passport or embassy red tape for visas), you'll come across the fact that it will hardly be cheaper than the one booked for a month. In addition, it is bus tours in most cases that are group by nature, and "getting" to the group at the last moment will not always succeed.

In Russia, bus tours are most often arranged along the Golden Ring, to the resorts of the Krasnodar Territory, as well as religious and thematic ones, for example, devoted to the culture and way of life of the small peoples of Russia.