In reply to Vigo :
I'll definitely agree with the lots of caster helps drift recovery thing. Once I cranked up the caster, the Jeep become downright hilarious to drive in the snow. Chuck it sideways under power, when you want the tail back, just back off the throttle a little, give a slight, quick flick of steering input and the tail snaps right back in line.
Vigo said:
One of the other things trail and positive caster do is 'self countersteer' when a car is oversteering. When you look at in-car drifting vids where the driver more or less just lets go of the wheel and then catches it when they want it to stop spinning, that won't happen with 0 caster or trail.
I was going to mention this. It is one of the most important things that caster does, along with increasing camber with steering angle, and causing cross weight to increase with steering angle. An increased desire of the front tires to point in the direction that the car is moving is extremely handy, weather you're pulling out from an intersection or catching a slide. One of my friends had Chevy Luv that would catch its own power slide if you just tossed the wheel in the direction the tail went, and modulated the throttle. You could then watch the steering wheel slowly turn itself back to straight as the truck straightened out.