Thanks for info on printing out receipt. I have done the trail 1.5x before, and the video is uninformative relative to the 30 minutes of dealing with cougars and grizz that Glacier National Park (USA) requires of backcountry travelers.
So maybe I will see how things evolve, and give an official body a call later in the summer.
(The Visitor Center is a magnet for tour buses.)
The shelter at Berg Lake proper is extremely useful for drying out after long rainy nights.
Robson Helimagic drops off Mondays and Fridays at Berg Lake, Tuesdays after a long weekend. Home page says won't be doing so for a while; not an essential service:
If you just accept that the trail is a social experience, the tour is absolutely gorgeous. Multiple hikes to be had out of Berg Lake, so more than one night there is useful. The hike to Snowbird Pass above Robson Glacier is itself a full day.