That's anybodies guess; we could get a lot more snow between now and then or we could get nothing. Sugar Bowl typically gets more snow than any place but early in the season don't expect much cover on really steep terain anywhere unless we get some real dumps. You know, you can just Google for the ski area web sites and see how much each one has as you get close to December.
no, the coverage will be good; as long as tahoe doesnt hit a dry spell for a month. they already have a great base down.
you should probably expect 75% of everything open by then, as the problem is really that most places arent fully staffed until peak season, which usually starts mid-december. expect anything off the main lifts or near the base lodge to be open. lifts farthest away are usually last.