Good guide matey, you and I are in the same boat this week I see?
Another good tip is that, you'll get alot more grip if you ride over fresh, un-compacted snow than you will if you go in the tyre tracks, that'll just make you fall off.
Any snow over around 4" deep is next to impossible to ride through, coz it gets jammed up in the front mudguard and squashed into ice, which can then seize the front wheel causing you to go foe a burton.
Also, there are two main types of snow.
1st, wet snow, this is the shit we usually get in the UK and it's as slippery as hell and therefore alot more difficult to negotiate.
2nd, powder snow, now this is the snow we had back in December 2010, it's very light and falls at a much lower temperature and is hard to make snowballs from coz it's so dry.
This snow is pretty easy to ride through as it's got more in common with sand than wet snow, there's alot more grip available (relatively).
The snow this weekend is initially going to be wet snow, but then it'll be followed by dry powder snow from Europe, the two types together will make riding deeply impractical and also the depths are going to be up to or over a foot in places around the Midlands, so i's get the bus if I were you