Everyone is allowed to bring his/her own food to the event. There also are stores in the nearby city of Uslar where you can buy food and drinks.
Though, open fire, grilling/BBQ is only allowed at a designated place due to safety reasons!  Gas camping cooker are allowed at the tents.
There will be a food truck from a third provider all day until evening where you can buy food as well. Same is for drinks and alcohol. You are definitely allowed to consume alcohol at Everfree Encore! But please keep it within your limits, that’s more fun for everyone.