You can get by with the Amtrak toilet paper and it won't kill you but bringing a spray can of Lysol along is benefical as it will help sanitize the bathroom. Lysol will kill 99.9% of all virus, e-coli and other dangerous germs. We use it on the toilet seat, around the shower and especially on the shower floor where if you don't use it, you can and will catch a case of athletes feet. You need to spray it and wait a couple of minutes for it to work. Then you should be safe. As for the beds; you can buy a safe, natural organic bedbug spray that will keep the vermin at bay.
Seeing as how it's necessary to constantly touch communal surfaces to steady yourself while walking through the train, shouldn't you also Lysol every seat, seatback, wall, window, handrail, table, counter, utensil and menu?