We're going to UO for a week in August, and instead of flying down, we're taking the Autotrain.
Although I've never ridden the Auto Train, I ride Amtrak a lot because I hate flying, and it's a relatively easy jaunt down the East Coast to WDW. I'm intrigued by the AT but they don't let you ride it without a car! I guess that makes sense. We don't own a car, so alas.
The AT is an interesting pre-Amtrak relic that was popular with the snowbirds and continues to have high ridership. It's the longest passenger train in the country (in terms of length of the train itself); at full capacity it's somewhere between 3/4 mile and 1 mile. I've been on a stopped Amtrak that was passed by the AT and that thing just goes and
goes.
I am sure that you know this already but be aware that the train does experience frequent delays. The state of passenger rail in this country is sad at best; the host railroad (CSX, Norfolk Southern, Union Pacific, etc) owns most of the rails, not Amtrak. So you are subject to delays based on how cooperative the host railroad is being that particular day. Plan for delays and count it as a surprise if you actually arrive at the time printed on your ticket. If you're ever curious, check out
https://asm.transitdocs.com for a very cool live map of the Amtrak system to see where the train is at any given time (trains 52/53 I think). You can also use
this website to play around with date ranges to see when the train has actually arrived. The AT is unique in that Amtrak has a specific set of equipment it uses for the AT and only the AT; what that means is sometimes the train gets so late day after day that they cancel the train one day to get it back on schedule.
I don't mean to make you nervous by saying all this! All in all the train is a fun, relaxing way to travel. Hope you enjoy it!