Ath the end of September we'll hopefully have time to have a quick visit to Yoho to see the spiral train (hopefully, I'm not sure how regular it is??), natural bridge, takkakaw Falls and Emerald Lake. I gather these can be done in a good half day. If we get a full day, would it be feasible to visit Golden or Kootenay for a drive through? Would you recommend one over the other. We'll be staying overnight in Lake Louise and heading to Jasper the next day. We can always visit Yoho that morning too if we did Golden or Kootenay. I know you can spend weeks in these parks alone, but it's just to get an idea of them.