Yeah even the northern plains of the US are still often like that, especially if you travel on weekdays and/or in winter. I didn't see another Tesla at a supercharger (or anywhere else for that matter) driving from WA to Howard, WI (via North Dakota) back in May. I did skip the Minneapolis area superchargers, but still...
And yeah the hotel situation in BC sucks. I almost drove through the night because of it, but then I thought better of it and snatched up a "GREAT deal" paying only 150CAD for 6.5 hours in a 1.5 star motel
Many towns were completely sold out and 300-500/night was not uncommon for average hotel rooms. It isn't due to the open border though. I haven't even seen a single American license plate this whole time and I've actually been looking, even in hotel parking lots. I think there was a small rush of people who wanted to see family members but those people aren't really road tripping. Most of them were just traveling between the Seattle area and the Lower Mainland I guess.
Anyways, so far I swept through my previously unvisited superchargers in the Vancouver area and then went through Princeton, Kelowna, and then up to Revelstoke and over to Calgary. The smoke in the interior of BC is the worst I've ever experienced and I've experienced a lot of it the last few years! I'm not super sensitive to it but this was the first time it bothered me. Could feel it in my chest and my noise was watering all day. Also the first time where the smoke overpowered the Biodefense mode of my Model S. Normally when I run that thing you can't smell anything that's outside, but this time it still smelled smoky, just less smoky. For the drive along the water between Salmon Arm and Sicamous, I couldn't even see the water even though it's only about 100 ft. away!