Festival Fashion Inspiration

Its only two weeks until I set off on a road trip to Stafford for V FESTIVAL!!! I'm so excited but this is my first ever festival and am struggling with what to pack!
I was thinking of dresses because they are small so don't take up too much room with my military boots, and maybe some cut-off shorts (which I will be making) and vest tops.
I know I'll only be there for four days but I always pack too much!!
Here are some of my desired festival looks, lovingly taken from weheartit.com

 (Hmm I wish!! haha)

Any tips, general ideas for what to take for a first timer? All help would be greatly appreciated!

Manths xx