Scenic Trains in Switzerland
I am planning a trip for late August 2017 to land in Zurich, take the train down to Zermatt or Brig, take the Glacier Express to Chur, next day take the Bernina Express to Tirano. I understand that I can't buy and reserve tickets on these panoramic trains until 90 days before my travel date. Does anyone have experience doing this? How difficult is it to snag such reservations? I don't want to schedule my flights around this itinerary only to find I can't get the reservations I need (perhaps because the tours are taking up all the space?). Also, if I had to choose one or the other, which one is the most scenic?