If the ribbon or scarf is dangling they might make you remove it. It can get caught in baggage sorting machinery. So be sure it’s secure with no loose ends.
You will LOVE it! At least I did. The scenery is incredible. in may they will have an NPS volunteer to give commentary about the trip. That’s in the viewing car. The food is good (no. You don’t need to bring food!!!) and it’s fun to meet others during meals as you watch the remarkable views...
The Amtrak website is horrible, in my opinion. And I don’t think I’m alone. So don’t feel bad if you can’t immediately figure out where you want to go! But I do think and hope that you will love your trip.
There is a fantastic architecture tour given by the LA Conservancy. In about two hours of walking through a lot of downtown we got a great overview of the growth of Los Angeles and quick looks at many architecturally significant buildings. Very knowledgeable guide. I highly recommend this...