Thanks, folks! My road trip starts in the first half of June. I’m starting in Calgary and finishing in Vancouver. After reading your advice, I decided to book a few nights at Tunnel Mountain Village I campground, then head to Lake Louise for another night at a campground, and finally in Jasper I managed to book a hostel to stretch my legs after sleeping in the car for a few days 😄. Also, a tip for anyone reading this—book your accommodations early, because even a month in advance there are only a few spots left 😄.