10:32 p.m. on October 23, 2011 (EDT)
I see Bill put up directions for you while I was typing away. :)
I'm not that keen on the 120, too twisty for my taste; the 140 looks out of the way from SF, but once you are on it, it's more of a straight shot to the Valley.
Pretty sure you won't see any snow on the roads in the park in November, especially on the Valley floor, but you may see some on the mountains and you won't see any before you get there. The daytime temps in the Valley are in the 50s-60s right now. I've been up there in February the past few years (not last year, though) and there is plenty of snow up high, but not necessarily in the Valley, but that is middle of winter and November is far from that.
Bill is right, with AWD and snow tires, unless there is a ton of snow, you won't need chains. If chain controls are on, you may not be able to get into the park without them with 2WD, but I doubt there is any snow,except at the higher elevations and not much there from what I can see from the weather.
I've stayed at the tent cabins in Curry. Not exactly deluxe accommodations, but cheaper than anything else other than camping. They do have heaters, but bring a sleeping bag and winter clothes unless you are staying in better accommodations. Bring gear for temps down to low 30's-parka, sweaters, fleece jacket, pants, warm hat (fleece beanie) and gloves or mitts. You can get by with jeans if you aren't camping, although I don't usually wear them in cold weather, but again, it won't be that cold.
A good book is the Rough Guide to Yosemite. Get it at REI or Amazon. It has small maps, lots of tips on where to go, eat, what to see. Also check the park's website.
http://www.nps.gov/yose/index.htm
The concessionaire has its own site, which you may have seen already.
http://www.yosemitepark.com/default.aspx
Weather forecast-
http://forecast.weather.gov/MapClick.php?lat=37.7400&lon=-119.6000&TextType=0
As far as what to see, the park's website and the guidebooks have all that. There is a good shuttle bus system that runs throughout most of the park, so you can park the car and just ride around on the bus (free, if I remember right).