There's plenty of good stuff to be had, for sure. Stuff that's super easy in the dry, though, can become a complete nightmare when it's really wet and/or snowy. December can go either way. I'm hoping for some moisture
Another thing to think about is renting the Grey Pine group campground. It's a really nice alternative to Davis Flat. No kids/squids ripping past your camp non-stop kicking up a shitload of dust, nice big tree in the middle, big fire ring, vault toilet, plenty of room for everyone, creek running right by it...and even if only 10 rigs show up it's only $7.50 per night per rig. Worth it, in my opinion, to have a space to call our own.
And it's available
on Thurs 12/5 to Monday 12/9

Just thought I'd throw that out there...
EDIT: Davis Flat used to be free. It is now $5 to camp there.
StonyfordLovin'Chick