VSA works by cutting back power and selectively applying the brakes as it sees fit.
It does this under some sort of complex black magic, and is primarily designed to try and get you safely round a corner.
I've always been told (and do) turn it off in the snow, as it's one more thing which can get confused by what the car is doing, and it's actions may be contrary to what you want to happen.
As above,
VSA off, 2nd gear, low ish revs, and don't slip the clutch, and you should be fine
In your particular case though, it's a balance between parking it on the drive (away from out of control drivers on the road, but hassle of having to clear the drive and negotiate back down it in the morning), or leaving it one road (less hassle, unless one of the above drivers smacks it...)