Yesterday's conditions on the eastern crest in the Whitney zone were really nice (zero smoke). The smoke had cleared out the night before. I spent all day climbing the crest peaks spending most of my time between 13k - 14k feet and looking west, I could see the Kaweah's perfectly. The smoke was hugging the western portion of the sierras. It was cold, but that to be expected in early fall at elevation. Some clouds rolled in later in the day. Trail conditions are perfect - lots of hikers going to Whitney.
Check this smoke map before your trip:https://fire.airnow.gov
Good luck on your trip!