I'm currently planning my autumn (August/September) trek somewhere in Canadian mountains. Canada is vast and there are many very spectacular places, but some are very popular; for example, Jasper National Park gets some 2 million visitors per year, and even backcountry camping is limited to campsites and need reservations. This means there is neither solitude nor flexibility, so I will look for a less popular location. I've been considering Kluane national park, Mealy mountains national park, Tatsenshini-Alsek provincial park, Northern Rocky Mountains provincial park, Tombstone territorial park, and others. I suspect the number of visitors for those parks ranges from less than a hundred to hundreds of thousands per year, but I'm only guessing. When off-trail hiking is possible and permitted, the probability of solitude naturally increases dramatically.
For U.S. national parks, visitor statistics are available online. For Canadian national parks too. Total visits for BC provincial parks top 20 million. But is there anywhere where per-park visitors for provincial and territorial parks in Canada are estimated?