The park that it is held in, is such a shady, pretty place, with hills and dales and the cutest little buildings. Since it is a permenent location, they can really go all out with the decor, unlike most renfests that are set up in city parks.
Plus, how often do you get a chance to be a fairy for the day? Well, actually.... I can be a fairy whenever I feel like it, and often do. I guess I mean how often can you be a fairy in an acceptable venue? When people expect fairies to pop out from every bush, and don't just look at you wondering why there is an old lady with wings on.