DSD on 11/30/2012 8:15:33 AM:
I would definitely use a shuttle service since March weather is unpredictable, rain, wind, snow, sunny all in a week. And as noted the trailhead services are not open yet. Shuttle could pick you up at the car and after a day of riding take you to a B&B or hotel and get you the next next day and take you back to the car at the end of the week, the only way to ride.