Each event location has different restrictions for their property. For the most part, we've been asked to keep pets off of the properties we are set up on. When there are exceptions to that, you will find that information clearly posted on the event website.
As example, the Taylor Winterfest has a "Frosty Paws" themed weekend, where it's encouraged to bring your dog! Outside of that weekend however, it's preferred that our favorite friends stay home.