We want to drive this week from Los Angeles, make a one day visit to the Grand Canyon's south rim, and then continue to Yellowstone to spend 2-3 days, and then drive east to South Dakota for sightseeing and then asap back to Philadelphia. Although some people would advise me to visit the splendid parks in between, there just isn’t enough time! What would be a reasonable drive for a sole driver? If you have experience driving between the Grand Canyon and Yellowstone, I’d be especially glad to hear from you. Is night time driving in Utah, Wyoming or SD very difficult? Should I do the south or west approach to Yellowstone? Would it be better to spend 2 nights in between the Grand Canyon and Yellowstone, so to avoid night time driving? If so, in what towns should we stop? What route would be the easiest and safest drive?