Packing for camping is one story, but getting to the venue is another. Not everything that's allowed at the camp sites is allowed in the festival. Please remember that things such as aerosol products, air horns, animals (unless they're service animals), chairs, glass or metal containers, outside food and beverages, and nonprescription drugs are not allowed.
You can, however, bring blankets and beach towels, laptops and tablets, nonaerosol sunscreen, water bottles (not made of glass or metal), and e-cigarettes and vape pens. Read the full list of items that are prohibited and allowed at the venue here.