Have had several outdoor activities (day rides, centuries, short tours, canoe/kayak overnights, backpacking trips, etc.) postponed or cancelled during the last several years in CA/mountain west due to wildfire smoke. For me, the biggest impact has not been the actual fire areas, but the far-reaching impacts of wildfire smoke which can cause very unhealthy air quality hundreds of miles away from a fire. Not to be overly dramatic, but I've seen smoke impacts during the last 2 years that I would describe as almost apocalyptic (e.g., last year's lighting caused fires near the Bay Area). Don't mess around w/ bad air quality...you might think you are a picture of health, but being out and exerting yourself in that stuff is bad news all around.
A now critical component of my short/near term tour planning are the real time ground level smoke, cloud level smoke, and air quality maps available via various weather apps, etc. My favorite is what's available on the OpenSnow/OpenSummit apps, but I am already a subscriber to those apps as an avid skier (the OpenSnow forecasters provide the absolute best snow forecasts available IMO). I've used these maps several times this year to help navigate the current fire season and my cycling and canoeing activities in the Sierras. An essential tool if you are in the mountain west during fire season.