What do they usually have at the Mixer?
Well...a lot of fun activities from the stage and I usually see a lot folks from the DISboards and other Disney websites that I have met over the decades.
1. Usually a long line to get inside that winds around in front of the Canada pavillion. But I usually meet the nicest DVC folks and make new friends talking about Disney, of course.
2. At opening they open the large wooden gates and we show our DVC card and walk up the decorated courtyard with it snowing, at least last year.
3. Enter the enclosed building, not a tent, and proceed to sign up for giveaway gifts.
4. Enter the main hallway and try to decide where to go first.
5. Last year, I got a drink and cookie, I think and then headed over to take photos with Santa Goofy. They give you a card to go online to purchase see and purchase photos and a castmember has always used my camera to take the same photo for me, too. I can't remember if the characters change year after year.
6. Head over to the other end of the floor and take photos with Santa Mickey Mouse and Minnie Mouse.
7. Once the photos are out of the way, I go look at the pin trading table and try to trade one of my pins for another one on their boards for something that I like. A lot of people like to buy pins and collect and that line is pretty long.
8. Then I look at the Christmas merchandise on sale just out of curiosity.
9. Then I look around some more and enjoy the stage games and music with the families and I always run into someone that I hadn't met in years and we talk and give hugs. So much fun.
10. As I leave the exit doors, I receive the DVC metal ornament in a velvet bag they they give out every year. That's about it. Or at least what I can remember. I have never won any prizes there...yet.
I would suppose that would depend on the individual and my idea of fun may be completely different from someone elses idea of fun. There are a lot of DVC folks and guests at the event inside, but not so crowded as to be uncomfortable based on my experiences.
We went to something similar a few years back at the International Gateway. They had games for the kids, and my boys had their faces painted. Not sure if this Mixer is similar to what we attended in the past or if it will be smaller since the area between Canada and the UK looks much smaller than the area at the International Gateway.
Me, too. Outside Epcot's International Gateway and accross from the boat launches. They used a big tent back then, but the new place is a building that you can see in the map in the link on the first post. It is very similar, but much bigger and climate controlled and more activities as described above.
I hope that helps?
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...and yet another year when the party is not during Christmas week. Oh well have a great time. 
