For me, there's 3 things I consider 'must have' for overnight coach travel: 1) one or two small blankets, 2) two to 4 inflatable pillows, and 3) tape and a piece of thin card stock to block out the aisle light that is always in my eyes. For pillows and blankets, I've found an inflatable pillow with blanket inside that comes with eye mask and ear plugs on Amazon. Use the pillows to stuff down the crack between the arm rest and the side of the rail car. In the winter, a heavy overcoat works very well, too.
Tips from someone who enjoys Coach.. What can day I love making train friends and never have had any creepy seat mates. The Amish and Mennonite families are a joy to travel with. Well behaved children and kind people.
Tips for Chicago to Emeryville and other long distance trips
1. Bring a pack of makeup remover wipes. There's a big restroom that has a little bench and a nice mirror for putting on makeup,with a sink and an outlet for your flat iron or curling iron.
2. Eat dinner in sometimes in the diner but get pizza for your first night. Can't remember the the name of the place across from Union station but it's pretty good. They'll bring it over to the station if you don't feel like carrying it. Get enough to share.
3. Bring wine in those little plastic bottles. Bring a few bottles of water, an insulated cup and tea bags or instant coffee. Sometimes I bring a 6 pack cooler for snacks and cheese sticks and yogurt.
4. There's halfway decent stuff for breakfast in the cafe car.
5. Bring a sleeping bag and roll it up tight. Smoosh part of it for a pillow. If you feel like stretching out for awhile, around 10 or 11 go over to the dome car.
6. Tip the attendant to get a seat to yourself. I've done that when I don't want a seatmate and feel like stretching out a bit.
7. Bring an extension cord. You might need it if you don't get the window seat.
8. Use Yelp to find restaurants near stops where you know you'll have at least an hour stop. Call them to have it ready. Breakfast and lunch are overpriced and not very good in the diner.
I'd love to know what you do with the cardstock and tape!?