Just for the reason that you think it is practical easier to meet her there then meeting her in a local town. But if she lives for example in Samara (see also our Maps-page) then you need a train or local flight for another extra day traveling.
If traveling to and from her is an important issue for you, then don't make a big deal of this. Don't bother about this minor thing, for her it's easy and rather cheap to travel through Russia, so you can suggest, if you visit her, if she wants to go by train or bus to Moscow or any other (easy to reach) city of your choice, and meet you there.
Also use some good photo's of yourself, at least two, one close-up and one where your whole body is visible.
Do not use swimming shorts or half naked body photo's, just some nice casual clothes, do not exaggerate, just be yourself.
Petersburg, you never know, her parents could live in Vladivostok and you really will have to visit her family now and then. Petersburg are quite different (more effected by western life standards) from women from a local city or village.
Visit Moscow and some other local city and you will agree that these two cities are two complete different worlds.
Before you start browsing through the women's personals, you first should have (written down) a very complete profile about the type of woman you are looking for, including the age range you are looking for.
Be realistic and don't look for a 20 year younger woman, even when her ad shows an age range of more than 20 years, it could be not her personal wish.
Start browsing (free) through the database of available women, using a comprehensive search-form.
For one thing you can be sure, it says nothing about her character.
So if you see a nice woman in a sexy, very short, skirt or dress, then keep in mind that this dress is probably not even from herself, but only borrowed and used to make a photo to impress you (and I bet she did impress you! For Russian women counts, it's much more important what is in the 'inside' than how the physical looks are, for men it's often the other way.
If you see photos of women in sexy clothes, then it will be only for the reason that the agency where she is published, asked her to do that.
They tell her she will have more change to be chosen first, then publishing a photo in just jeans and a T-shirt (as a matter of speaking).
And don't be afraid, every Russian woman is beautiful, and you will be that too for her, but only if you show it to her.