Just back from the Auto Train. Here's a brief summary of my experience for those who are looking to book:
Southbound: We had a bedroom, which I'd bid on and won. Plenty of space for the two of us. And it was so nice having our own bathroom. However, I tried to get a "mini-shower" in the early morning and I will never do that again, LOL. The water never got warm. Plus, those bathrooms are great if you weigh 100 pounds (I do not

). It was not a pretty sight. My husband was much smarter than I was....he used one of the regular showers on the first level and was very happy. We got some sleep (maybe 6 hours or so). Our room attendant was great. The train was about 3.5 hour late into Sanford, so people were grumpy. Apparently, some trees had fallen onto the tracks due to a storm, and it took a while to clear them. Overall, I'd do a bedroom again.
Northbound: Misery. We had a roomette and it was hot as heck. Both my husband and I woke up soaking wet with sweat several times. Thankfully I'd packed a USB fan so that helped to circulate the air some. The train ride was
very bumpy up on the second level, and I wondered how the people on the first level were dealing with it. Our room steward was just OK. The train arrived in to Sanford about 20 minutes early, which was nice but seemed to upset the room attendants. Our attendant never came back to remove the bedding when we were at breakfast, so we did it ourselves. No big deal. The train was sold out (snow birds, I believe) and they ran out of some breakfast food. Next time, I will get a bedroom instead.
We used Priority Boarding on both legs of the trip, and it was worth it. Especially when we arrived in Lorton.