Can't help you within the boundary of the park but I was in Kalispell for most of the day.
Some haze but not ground smoke. I'm now at McGregor Lake and it's mostly clear. Had a good rain yesterday. It's a crap shoot as to if there will be smoke in this part of Montana on Aug. 13th > There are a couple fires up by Yaak producing smoke but they are small. Keep checking https://inciweb.nwcg.gov/
for the latest fire info.
Best of luck - hope your trip works out.