I got my low-clearance Nissan Sentra to the Meysan Lakes Trailhead parking area last weekend. It looked to me that a 4WD could have made it farther up the road.
If you do head past where the "deeper" snow is, use common sense and get your vehicle clear of the road. Every once in a while we see dolts who leave the car/truck parked smack dab in the middle of the road, assuming that since they couldn't make it, nobody can. I often wish that I'd come back down the road and see that a monster truck has crawled over the thing.