My sister and I are driving from Rochester, NY to Phoenix, Arizona to attend a wedding. We are leaving on March 18th. AAA has us heading south and then going across I-40 most of the way. I've driven cross country to California several times with my husband but it was always in the summer. Should I encounter bad weather leaving in the middle of March? Any interesting things I should stop to see along I-40? I have never taken this route before. We have about 3 1/2 weeks. After Phoenix we're going to the Grand Canyon and then to Las Vegas. Thanks for all your help!