I wholeheartedly agree that for certain styles of outdoor travel and recreation, the "West is the best". Fire season adds another layer of complexity to travel planning. For that reason, and given that I must dedicate a full week to simply getting to and home from MT, ID, and WY, I always have a roughed-in "Plan B and Plan C" in the event of forest fire closures.
In late July 2000, we departed Rock Creek, MT for Missoula, turned in our (badly thrashed) Dodge Durango, and flew home. Two days later all of Rock Creek and much of the Lolo NF and Beaverhead-Deerlodge NF was closed to all camping and recreational use due to an extreme outbreak of fires. Had we been headed IN for our trip then, all of our plans would have had to change. By the way, we had NOTHING to do with the fires. Dry lightning storms had passed over a wide area during our final night at the Stony Creek cabin, and as we drove the final 35 miles out of the Canyon to I-90, we saw several smoke plumes along the ridges, choppers dipping water out of Rock Creek, and an army of firefighters headed up the canyon.
In that part of the West, there is a "sweet spot" roughly mid-June to mid- late July, when the rivers and streams have fallen back below peak runoff stage (so are more likely fordable and fishable) and before the annual fire problems are so widespread.
Foy