Has anyone ever been to Cavatast in Spain?

Hi! My husband and I are going to Spain in October and I just discovered that Cavatast is the weekend before our trip. We are thinking of changing our itinerary to attend but I can’t find much info. Has anyone ever been? Does anyone know the cost? Have suggestions on where to stay? Thanks in advance for your help!

A lot of info here. Ajuntament de Sant Sadurní d'Anoia - Turisme

George