The Mew Lake camp ground is open year around. They actually rented every available campsite last weekend. The Pine Martens can get in and out of the garbage bins. So most of the image you see are of the 6 or so that visit the bins. Many of my images are from there. The one this year is from the Spruce Boardwalk trail. I've only ever see one there but there could be more and they only come one at a time, as opposed to Mew Lake where I've seen up to 4 at time, and once 4 plus a fox. My best images come from the parking lot in the first image. I was there when no one else was there. These animals have a route they patrol, so you have to be in the right spot at the right time. On this set of images below, the animal was up on a snow bank eating seed left out for birds. That meant I was able to get reasonably close and below the animal, enough to get some light in the background bokeh. I've only ever seen one there, and I've seen two at the Costello Creek campground, although only one this year. So different circumstances at every site, and many different places they can be seen.
Costello Creek picnic area.
Spruce Boardwalk
Cameron Road Parking lot (where most go for Canada Jay pictures).
Mew Lake campground.
I can't think of another place you can come up for a weekend and pretty much be guaranteed images of Pine Martens. Usually I only see them at one of these locations, but if you do the rounds, you'll get one somewhere. I often visit all 4 sites, they are about 20km apart from the nearest tot the furthest.
My guess is it's probably not more than 12 individuals who are being photographed. If they weren't somewhat tame you wouldn't see them at all. The trick of the wildlife photographer, go where the acclimatized animals are. I have 5 images taken in places where they are more wild, and they are all heavily cropped and taken as a whole, really bad images.