BC Parks has a campground called Skihist right near where you describe, and in my stops there on long summer trips I could seldom sleep because of the heat there in the "rain shadow" area of the province that never gets the moist Pacific air typical of the Vancouver area. Temperature highs in the mid or upper 30s were often seen in the high summer, but never in the high 40s. What a glum, sombre Canada Day owing to this devastation in Lytton, the findings at residential school sites, the lingering effects of COVID... so much tragedy in 2021.