A good sleeping bag - bringing a duvet is just a big no-no. It gets wet, they are hard to carry and to be honest you look like you've never been to a festival in your life. You can pick up festival sleeping bags from Millets which are specially designed for festival season, I brought one this year and they are spot on. For those who feel the cold I recommend bringing a jumper to wear to bed just incase. A good tent - the best way to ruin your festival experience is to buy a poor tent. Two skin tents are a must, single skin tents will let in water and if you touch the sides when you stand prepare to get soaked. If you can afford a tent with a porch then buy one - it provides a nice shelter for your party when it pours. If you have a flag of some sort then attach it to the top of you tent so you can locate it within the hundreds.

A picnic blanket or ground sheet. There is nothing better than getting your friends to form a circle of tents around a central party point in which you can lay a ground sheet/blanket. A small patch in which you can all sit together is also a festival must, it forms the pre-party before you head off to enjoy the entertainment and a breakfast spot to laugh about the previous nights activities. Some people like to pop a gazebo up in this space - this is a brilliant idea however some campsites don't allow them. Be warned, if you are leaving a gathering space then make it small enough so someone can't put a tent up in it - lengthen guy ropes into the area.