I will be attending a conference in Denver in early June. A friend from Australia will also be attending the conference and will return with me to Southern California for a visit. She would love to see the sights between Denver and LA and I am considering renting a car and driving back, stopping at Moab the first night, Bryce& Zion the second, and then Las Vegas the third. We only have the three days to get back so my question is whether it is worth it as we can only do a "drive thru" of the major sights? I drove this route MANY years ago and recall that it was not too strenuous but my memory may have become distorted with time.