Okey, some easy place to make it!
If you play some heavy tank on a map Widepark (
http://wiki.wargaming.net/en/Widepark), your starting position is top and you are among best tanks - take your chance!
Go B-0 (top right of the map), you'll see some trains on the railroad, there is a way between the end of the map and a train, you can enter this place only from B-0 or C-0 and you can drive all the way down to E-0 or F-0. No need to go all the way there from the start of the macth, first do your best to stay alone versus several tanks (try to kill heavy tanks staying near the enter of this place). When you are the only one left and they know where you are go backwards that way. Anyone goes for you will go from B-0, so kill them or let them shoot you if you know the can't hit you. They could try to shoot you through spaces between trains, be carefull and move from that spaces. Shoot the tanks trying to take your base same way through spaces between trains. And trains are partly destructible) If you play this game you got the idea.