You can buy camber lazer gauges but it's best to get it done properly, okay for a temp setup. Drifters use them to perferct there setup and can get them if you need from Sard.
Rory is right with the launches and straight line as it does produce a little negateive camber but bare in mind Toyota dial in a little positive camber to counteract this. You ideally want the tire as flat as possible with the small fluctuations of camber in mind. For the circuit then that's a different story, I run up to 3 degrees neg!
T