Isnt that what your LS1 Jeep is for? What part of So Cal? I am sure there are a couple of us that wouldnt mind doing a little mudding and assist in pulling out a 2wd if need be.
Unless you're having problems getting going, a 4WD isn't going to help much, compared to a good set of tires!
In the Sierra's, I can tell when my 4WD kicks in, and it really hasn't done that even driving through 18" of powder on my unplowed driveway, which I'm going to need to do tonight (had to leave town and we had a nice little dumping on Wednesday and Thursday).