Amtrak is pretty flexible with their policies on special equipment. For example, if you have a small musical instrument (such as a flute or clarinet), you're welcome to bring this on board so long as it will fit in the overhead luggage racks or in your own luggage. Larger instruments, such as guitars, can be carried on for a nominal $10 service fee, and larger instruments (such as tubas) can be carried on with the purchase of an additional fare.