Hello, my bride and I are planning to rent a one-way rental car from DC to LA in six days. We plan to fly back to DC from LA. We would like to see scenic routes along the way, especially the Grand Canyon and Las Vegas, which we want to stay for two nights. Would anyone recommend what cities we should stay in-between DC-LA for, say, 10-11 hours drive each day? What average speed should we drive? Thank you for your advice!