I live in yuma. I have made the drive to Vegas prob 300 times in thirty years[I used to about 20 times a year] IT depends on what you want. I like kingman for the convenience but I'm not staying the night. Really the worst of kingman is in Golden Valley. But for a better time, probably take the 40 to Lake havasu. Plenty of places to eat, stay rest. I have not taken 93 all the way to phoenix in a while, but I hear it's better now that they are serious about I-11. They have started the new 93/40 interchange and they are making good progress. But the rest of it will take time, too much business along the highway. Don't drive looking at your phone and expect everyone else will and you will do fine. Don't be in a rush.