My husband and I have been to Wengen before, but never with our infant son. We will be traveling from Zurich to Wengen via train with a stroller and car seat attachment. We won't need the car seat in Switzerland at all, but need it for the plane. I'm wondering if on the bigger trains from Zurich (Zurich to Bern and Bern to Interlaken) will we have to keep the stroller folded or is there room for the stroller to be open and our son sitting in it on the trains. I really don't remember from our previous trips. I'm just contemplating whether I should just do Fly Rail Baggage for the stroller and pick it up in Wengen instead of traveling with it or not. Thanks for the help!