I am driving from Boston, MA to Irvine, CA on 1/26/08 with my sister and my dog. We are driving a mid size car and will not be towing anything. I would like to get there in 6-7 days. Can anyone give me advice on the best route to take? I have been using AAA trip planner but I am not sure if I should go the northern or southern route. Any advice is greatly appreciated.