I've read that this drive takes about 5-5.5 hours and is quite boring. However my husband is keen on it and so we are planning to go to Vegas by road.
Although the route seems simple through the desert, I just had one query - Does it involve driving through hills as well? He has a fear of heights and doesn't enjoy driving in hilly areas. As long as it's through plains and desert, we should be fine (except super hot in the August heat!)