Best bet is to book the shuttle in advance from: https://reservation.pc.gc.ca/Banff-LakeLouise?Type=7&language=en&_ga=2.23675321.240321276.1663113945-382698902.1663113945&gccf=true arrive early if you can, then expect to wait about 30 min to board. On the way back, expect to wait 30 or so to board the return bus. Or drive there around 6am, but not even sure if that will work.