In Canada, almost 90% of the land is Crown Land (owned by the government, not sellable to individuals). This land is available for resource extraction, but most of it is wilderness; Canada has like 10% of the world's forests.

So if wilderness is crowded, it's probably because lots of people are going to the same locations, either because those locations are famous and popular (like Jasper park in the article, Canada's second most visited national park, after Banff), because they're closer to where people live (90% of Canadians live in a 200km strip along the border), or because it's more convenient (permits to camp on some types of crown land are a massive headache).

I guess a couple things you could try to spread people out across the wilderness:
* free or cheap fast transportation from urban centers to less visited parks
* make it easier to visit and camp on crown lands that aren't officially parks - I don't understand the permit system and it various wildly by location
* convert more non-park crown land into parks.