Very limited experience hunting in smoke, so take this with a grain of salt, but when I've been scouting for deer and elk in hot, smoky conditions, they seemed to go lower and stay around water. Maybe the lower they go and the more humid air around water is easier on them? Just a thought, I honestly don't know. The humid air around water may be easier on their eyes and throats? Thick trees acting as kind of a filter for some smoke, giving fresh oxygen? Like I said, idk anything about it, but if you're not finding elk in their usual spots, it may be a good idea to try a thick, lower spot with lots of water. Anybody else find this to be true?