We were there back in fall when the fires were going, but weren't as insane as they were now. I was fine that week, BUT, also lived through the fires in Vancouver which triggered an asthma attack that I didn't even KNOW I had. If anyone in your group is sensitive, check out the drug store for some masks (and make sure they're the ones that block pollution/irritants) and don't be self conscious about wearing them if you think it's bad. Worth it to download an air quality app too! Many people don't realize/know/think that it's so bad for them to be breathing in!
Sorry I don't have any current info for you though! Hope you enjoy your trip!!