They were all taken on my trip through BC, YT and NWT to AK in 2001. It was in early Spring and the shoulders were soft from the snow melt. Signs said keep way to right when approaching a hill (that was on the Campbell HIGHWAY in YT, BTW) so there would be fewer head-on collisions, so I did.
But I stayed there too long; the shoulder on the hill was firm, but wasn't just a little further on. Trailer wheel dug in and pulled truck into ditch, so I rode it as far as I could but stopped when tires
I disconnected the truck and drove it out; 2WD was enough because I hadn't dug the wheels in. Then I put the truck on the hard part of the road, dropped the tongue of the TT and hauled it out with tow rope. If I lived up there, I'd make a sort of sled for the front of the tongue because I had to keep pulling it up out of the mud.
I was kind of sweating it and working my ears really hard because I didn't want one of the tanker trucks coming up over the hill behind me.
Here's another photo of a rental RV on another HIGHWAY near Chicken AK. This looks like just a back road but it's part of the way from Dawson City YT to the Al-Can near Tok AK, with tandem tanker trucks and large Princess Lines tour busses whizzing by...