Since you haven't gotten any replies I'll chime in. Way back when, 25 some years ago we used the Autotrain, it was a new way to go, I don't like to fly and we thought we would need a car while at Disney, really didn't know much about WDW. Its a 10 hour drive for us to Lorton, process was quick and easy but the price to take our car was nuts but away we went. Trip was grand, train ride enjoyable but we discovered we didn't need our car while at WDW.
Flash forward to present, last 10 or so trips have been on Amtrak, regular train one hour from our home. Trips around 27 hours, give or take. We enjoy the train, relax, take lunches and snacks, puzzle books, novels, gameboys and portable DVD player and kick back. The seats and area around is big and comfy but some people can't sit still that long so there is a club car to go to. We stay put, eat in our seats and have done the whole trip in reserved coach seats. Lately we taken to reserved seats on the first leg then we switch trains in D.C. and get a roomette, holds 2 people, kinda small, upper bunk and lower and a toilet and the up grade includes all meals. Train food is excellent if you're not really paying for it, other wise its expensive to go to the dining car. Wife and I like the roomette from DC to Kissimmee, we board around 4 pm and by the time we pull out of DC, and get settled in our room, its dinner time. We go in and take a leisurely meal and have the porter convert our room for sleeping for when we return after dinner. We watch movies, wife likes the upper and watches the lights out her huge upper window and we drift off to gentle rocking sleep. We're up kinda early, they give us a newspaper and we're off to breakfast, again, the best and by the time thats finished our rooms made up for day traveling, we're full, relaxed from a good nights rest laying down and settle back cause it isn't too long now to Kissimmee. Going home its the reverse, roomette from Kissimmee to DC and regular coach from DC to Ohio.
Our 40 th trip is coming up in 42 days, we're booked with Amtrak again, we use Sunray car service that picks us up, 30 minute grocery stop included and takes us back at trips end. We have never needed a car in all those trips and have had no problems with Disney transportation so never needed a car nor wish to rent one. But its along trip by train, we have had some delays but nothing major, we get there, the train is well AC'ed and heated in winter. Occuping yourself is the major problem. I can read and do alot, just even sit back and snooze which I don't do at home but its relaxing on the train, for kids, alot of games and such, but anything that makes noise needs earphones as to not disrupt other travelers. DVD players, Ipods, Gameboys etc are all welcomed and used but with the earphones. These are just our views on how we do and like Amtrak and getting to Disney. Just for your infomation, for wife and I, usually round trip from Northeast Ohio to Kissimmee Florida and back runs us $450.00. We up grade to sleeper on the train, cheaper, in DC and a roomette runs us then about 150.00. Worth it for 2, place to lay down, own toilet and all meals incurred for 2 during that leg of trip which include an extra meal since the train is usually a few hours late getting in so we gain an extra lunch.