Beautiful area! This may be a bit late, but...Facing the sun is always difficult, as is high noon or therabouts, because people tend to squint, and the lighting causes harsh shadows.
An overcast day, or waiting for a cloud to cover the sun, or fill flash, or a biiig square of white rip stop nylon to act as a shade...but that takes a couple of assistants, or a stand...more stuff to carry, (no wonder Minor White said "Nothing more than 500 yards from the car is interesting!) because you can't possibly handle that and/or a reflector yourself and do the pixes justice.
Fill flash would be the best..set -1 or 2 stops below ambient. A bounce card lowers full power flashes ~1 1/2-2 stops.
When I was learning, the Sergeant always said "Burn them up!" We could and did correct the overexposure in the darkroom.
NOW, I can disagree; 1 or 2 stops lower does just fine, and looks more natural , imo.
Location. People say OOOOhhh, What a
beautiful background, not realizing that to include a lot reduces the size of the subject.
Like those beautiful vacation shots of Yellowstone meadows with the little black dots. "What is that?", you will ask? "Bufalo" will be the answer.
Ahhhh,yes, NOW I see!

Avoid...get closer!
Good luck!