Artsfest of Greater Harrisburg in Harrisburg
ArtsFest is a real, recurring annual arts event held at Riverfront Park along the Susquehanna River in Harrisburg, Pennsylvania, listed by Wikipedia alongside the city's other yearly festivals such as Kipona and Woofstock. Public sourcing confirms it takes place, likely in spring based on a documented 2011 tornado disruption to its setup, but does not clearly confirm its exact current organizer, dates, or the precise name Artsfest of Greater Harrisburg.
Its city backing and Memorial Day weekend setting make it a solid arts row.