I have just agreed to help a friend drive from Alabama to California. Since I have never travelled more than 300 miles by car, I was looking for some basic general advice. First I am wondering what would be a realistic number of hours two of us could drive per day or mileage covered per day. We don't have a lot of time to dally, but we don't want to kill ourselves either. Any other key advise for a first time cross country trip is also welcome. Thanks.