Peter invites you to join him for a visit or a new offline tournament for Might & Magic: Heroes VI.

http://moskva.ros-bilet.ru/avtobus/sankt-peterburg-1858.html
http://www.avtovokzaly.ru/avtobus/moskva-sankt_peterburg
What's wrong with this option? The price is 1k or even less. We get on the bus, stock up on beer or something else, and arrive here in the morning, around 9-10.
Why rent an entire bus when you can just buy a ticket?
Cables, extension cords – that's my concern. 2 is, of course, a bit short, but at least it's something. Is there no way to get more?

http://www.avtovokzaly.ru/avtobus/moskva-sankt_peterburg

850 rubles per person, departure from Krasnoselskaya on the 23rd-30th, arrival at Kupchino at 10-30. There's an O'KEY store 5 minutes away, we can rest there for half an hour or an hour and stock up for our bus -> and then drive for about an hour to the base. A budget-friendly option.

For those who don't want to take a compartment for 2600 rubles,
http://www.tutu.ru/poezda/rasp_d.php?nnst1=2000000&nnst2=2004000&date=21.02.2015