We just returned this past Monday from WDW using the Autotrain. Check-in was very easy, both in Lorton and Sanford. In both places I checked in for all of us. I had photo ID for me and DH. There is a new policy regarding carry-on baggage, but the only thing I noticed different is that they gave us little name tags to fill out and attach to our carry-ons - each carry-on must have ID on it.