Cal4Wheel puts up this "snowy" event every year, and after having participated last year with a number of CF members, I'm inclined to go again in 2017, this time with 33's and a winch A rear locker would've been nice, but I probably won't have that purchased/installed by then.
The cost is $95/adult, all meals included from Friday night dinner till Sunday breakfast. One can camp at the event headquarters (Nevada County Fairgrounds, Grass Valley), or stay at nearby hotels; it's all very convenient.
There are lots of runs on both weekend days to choose from, from easy (SUV) to "extreme". Many family-friendly "historical" runs are also offered throughout the weekend, as well as night-runs, with the first one taking place on Friday after dinner.
Here's the link, with online registration, run descriptions, photos, etc.: