[For reference, next year:
Angel Park is located behind the Williamsburg Historical Society building (which is to the left of Brewmaster's Tavern); it's the grassy rectangle in the middle of this aerial view: https://www.google.com/maps/place/Williamsburg,+MA/@42.3917265,-72.7301956,89m/data=!3m1!1e3!4m2!3m1!1s0x89e72a17843ef7a1:0x35ad27eedaa705f1!6m1!1e1?hl=en
In the event of rain, shows are held in the Grange Hall, which is the building with columns to the left of the Historical Society building.]