We're leaving for the Rockies soon and have itinerary pretty much planned. I've been going over all the posts about Yoho Nat'l Park, but I'm confused as to what we can and can't do without getting on the shuttle bus. I've read in several spots that you need to make reservations 3 months in advance. Is that just to see Lake Ohara? Can we still go on our own to see Emerald Lake and Takakkaw Falls? I'm guessing we can, but want to make absolute certain first. Thanks.