I've never done this before ("threads"?), so at age 57, here goes: My son and I will fly from Phil. to LA to help his best friend drive back to Phil. to attend medical school. Neither my son nor I have been "cross country," although I've always dreamed of driving it, so now I'm achieving a dream! We are driving two vehicles, both with standard transmissions: a 30 year old classic Trans Am (I think) and a newish pick up, hauling a U Haul trailer packed with boxes, mainly books. We'll have cell phones to be in touch, and are allocating 6+ days to get across and back to work. Other than the Grand Canyon, and I know this is a huge (dumb) question, is there anything else we "must see?" I would love to go to the Zion etc. and do a southern route, since we've not experienced that before. Any and all suggestions would be gratefully appreciated.