We didn't have much trouble with the smoke either, but it really depends on which way the wind is blowing. Sunday night, June 29th in the Whitney Portal Campground, it was very hard to sleep because the smoke blanketed the campground from about 10pm to 4am. I was sleeping with a towel over my face and still had a hard time breathing. We also met on the trail a couple who had camped at LBSL that night and had difficulty with the smoke and were concerned that the fire was closing in on them (during the night) because the smoke was so heavy. So in general, we didn't have much of a problem, but the potential is there.