Someone suggested waiting till next year -- but will the smoke be any different? Ten years ago, we could count on clear air in September in the Canadian Rockies. But for the last several years, it has been bad.
And that is true, of course, for the entire Western USA, as well as Canada.
The immediate problem is a backlog (so to speak) of timber killed by bark beetles, all dried out and ready to burn. I don't know how many years will pass until that is no longer a significant factor.
But the alternative is to just sit home and grumble, which is what we (DW and I) did last year. So my advice would be just to hit the road and hope for the best.
Focusing on riltri's question, I have a couple of questions of my own, to narrow things down. Riltri, what sorts of things do you enjoy? Are you a hiker? A biker? Do you like to spend several days in one place, or do you like to move your campsite frequently?
One more random observation: DW and I have done a lot of traveling in North America. The Canadian Rockies, from Peter Lougheed in the south to Jasper in the north, are the most spectacular mountain range we have ever seen.