I was there many years ago and lucky enough to take the Mules down to Phantom ranch overnight. What I do remember from the South Rim was that it is nearly impossible to get the sheer breathtaking grandeur of the canyon in and all my shots have that characteristic blue cast you see. So my advice would be to have some shots with a strong foreground in if you can. I don't know if a UV or Skylight filter will help with the cast either, maybe someone can chip in on that. The Mule area is accessible as well, so maybe aim for some mule shots.
The route we took from Las Vegas also took us past the Hoover dam which is well worth stopping at. And lastly I'll leave you with an abiding memory from one of the mule wranglers..
"Up there in those cliffs we got some bear caves"
"Bear caves!?" everyone exclaimed
"Yep. There's nothing in 'em"
Last edited by 3by2; 03-22-2021 at 05:28 AM.