sperk,
yeah, and beware of bears playing balalaika and crossing avenues here and there.
Ramil is exaggerating. The real reasons why this idea is difficult to implement:
1) You can't rent a car as you do in the US. Perhaps rent-a-car companies exist somewhere in Russia, but this service is not popular at all. I didn't no anybody who rented a car in Russia. And the prices may be unbelievable: it's too difficult to a stranger to drive in big cities, and nobody will give you a car to cross the country.
2) You still can travel by your own car. However, it's hard (and often pointless) to travel on huge distances. The landscape is basically the same for hundreds of miles.
3) The summer is short, and in other seasons you need to have winter tyres and driving experience for ice and arctic conditions. What would you do if the engine won't start in the morning due to low temperature (the battery is weak, spark plugs don't spark, and motor oil gets too viscous)?
Hanna,
railroads are quite good, and traveling by train is an interesting experiense. I didn't travel by train further than to Altai, however. It's 2.5 days travel, we crossed the Urals overnight, and otherwise landscape in Central Russia and Western Siberia is about the same. Getting to Barnal, Altai, you're still on your 1/3 way to Vladivostok.
In Altai mountains, we met Slovak rafters. They were excited that the trip from Barnaul to their river (>500 km) is longer that the whole Slovakia.