My DNeph and I were there also - it was great to meet a few fellow DISers !! I had my
DVC card in my hand as I approached the entrance, so I don't know if they would have asked to see it if I hadn't been holding it, but I would definitely bring it with me. Yes, guests are welcome - I had checked on that and was told that was why the invitation was worded "bring your family . . . "
It was my first DVC party and a very nice event - my little DNeph kept saying "we'd better not win that basket, we already bought more stuff than we can carry home!" - I reassured him that we could ship it, but it wasn't waiting in our room that night, either !

We only stayed for a little while as we were heading out to
MVMCP, but did get pics and autographs with Santa Goofy, Pluto (I think he had a big red ribbon around his neck, Bill), and Mickey and Minnie in their holiday finery. They even had a picture spot set up for M&M with one of the professional photographers taking pics (a DVC rep also offered to shoot with my camera - great shots) - they rotated the characters - M&M / Goofy&Pluto - when you see M&M come through the back gate, head to the picture spot, the line formed quickly !! My next stop after the DIS (just got in last night) is to the photo web site to view our pictures - we loved using the new PhotoPass system !!
It was a lot of fun, and you could stay as long as time allowed for you - go and ENJOY !!
