Truth be told, the notion of festival dressing is something which as evaded me somewhat. Yes you need to be prepared for the heat/rain/mud/lack of bathrooms but why not dress in a similar vein to you normally do?
Festival dressing should be an extension of what you normally wear, albeit just a little more practical. Which is wear Hunter Boots comes in. I have a few of shows and festivals in Paris this summer where I’ll be waving the normcore flag for festival dressing (think denim, leather, and a lot of black and white) with footwear that can stand all seasons and still come out the other side.