If the fuel is your concern, why not just carry empty bottles and fill up at your destination? I can't imagine Amtrak would have any issues with an unfueled stove. My experience has been the same as both other replies, no one checked and I didn't offer not that I was even thinking about it at the time. The truth is that if you carry fuel canisters that are unopened, they are probably as flammable as a can of hair spray and that doesn't even raise an eyebrow.