That would be so much fun! I don't know if I would ever be able to make it, but, here are a couple of suggestions for what to do:
1) Best Tricks
Have each dog perform their best trick
2) Obstacle Course
Create on big obstacle course and see whose pet can do it best!
3) Race
who can run the fastest with their dog, and whose dog can run the fastest!

Maybe I can find a way to get there! I hope that I can! When you figure out when the exact dates are and everything, could you pm me please?