St. Petersburgh

I'm thinking of going to Russia to photograph St Petersburgh. I started reading the 'Rough Guide' to the city a week ago and was informed that I may have a lot of difficulty and getting arrested by the Police is not uncommon. Also, I may receive unwanted attention from gangs in the city, esp if I am out making images in the early hours of the morning on my own. I don't mean to offend anyone from Russia with this, I'm merely repeating what I've read and it does sound like I may have a bit of trouble if I go out in the early hours of the morning to make photographs.

So I'd like to ask anyone if they have any contacts for a good guide there? If so - please e-mail me directly. Thanks.