Prior to this year you could use the Orlando Magic Card for a 20% discount. However, when I made our reservations in January of this year I was told that the AutoTrain is no longer included in the discount, only the Silver Star and Silver Meteor and I believe the Palmetto on the east coast are included.
Amtrak fares almost always increase. I have never seen them decrease. The more passangers that book, the higher the rate goes. They have a tiered booking system. So many seats and/or roomettes are sold at the lowest rate, then up to the next rate and so on. I have seen roomettes go from $124to $314 and higher. On our booking, the family room started at $240 and is now up to $433.
As for the tickets, you have the option of either having them mailed to you,
or taking your e-mailed voucher to a local Amtrak Station and having them issued whenever you want, or you can wait till you get to the AutoTrain Station to have them issued. We usually go to our local station about a week or two before the trip and get them issued then, so it is a little less hassle at the Lorton/Sanford stations. If you have them issued at the station in Lorton/Sanford, you will have to park your car, go inside and have the tickets issued then go back to your car and get in line to go thru the gate where they issue you your car number.