It's a very long train trip and if she can do well with the length of time, I would say take the train. I've only been on one long trip by train and did the Rocky Mountaineer through to Banff, Canada. It was so much more comfortable to be able to get up and move around and the scenery was beautiful. My only complaint was that I like to snack every couple of hours and was still hungry after meals. So, the first stop we did, I went to a store and stocked up.