Do a search on Auto Train. There are several trip reports along with pictures on here. I know I found them helpful when we were considering it last year.
We are thinking about a first trip on the AutoTrain in June as well. We would just do VA to FL and do the drive home all the way. Thought it might be a neat experience for our kids.
I've read a bunch of threads here about the Autotrain, but none too recent. I'd also love to read some recent reviews about it...esp those that have taken the trip in June!