The Dog's owner Day in BU park

The puppy.com organise the event for all the dog owner to bring his /her dog. There are many many games like musical chair, the beuty pegant....etc. The most intersting is I saw some of the dog owner allow their dog to swim in the ponds. I'm curious here how did they bring back their dog? Will they feel smelly in the car? or are they just walk back only? Curious right?