I've been back and forth between Edmonton and southern B.C. a few times a year for the last few years. I don't think there has been a trip on which I have not seen various moulded fiberglass travel trailers, and probably at least one Escape each time... but Escapes are still far outnumbered by decades of production of Trilliums, Bolers, and Bigfoots (Bigfeet?). This is definitely a long-term game - with products that last for decades, Escape sightings will become more and more common.
Here in the Edmonton area, Escape sightings are still relatively uncommon for me... but then, I don't go to campgrounds here and my local highway time is typically during the rush hours.
I don't see many Scamps, but then a Scamp 1300 and a Boler 1300 are essentially identical so I might be missing them. I'm not sure that I've ever seen a Casita. The location of the manufacturer is quite relevant: despite the fact that all brands can be taken anywhere, people to tend to stay with relatively close suppliers, especially with these direct-from-factory brands. People living across the continent from Chilliwack and still buying Escapes is a strong statement about the appeal of the product and the company which makes it.