...I did try to upgrade to a Bedroom on the CONO, since the room itself seemed to be only $50 more for a 20 hour ride, but it turns out that companion coupons only work for Roomettes. I had noticed this online, but thought it was just a glitch with Arrow and that the agent wouldn't have that issue, but I was wrong. I was skeptical when the agent said that at first, but came to accept it upon hearing her read from the agents' official companion coupon restrictions list that it doesn't work for Accessible/Family/Bedrooms. Figures that Amtrak has their own set of different, private coupon restrictions that for some reason isn't visible to customers (she said as such). Sigh.