Very informative. Very much appreciated. I'll throw out some questions, if you don't mind answering.
What is camping like?
What is provided (just a space?)?
What should I bring camping?
Do you need to take a ferry ever day if you are camping?
Anything else cool you want to share?
Camping is great, but it's 70, 000 people camping in various fields (broken up by colours so you know to find your tent) so naturally, it's a sea of tents. You are always going to be camping practically on top of eachother (not literally). It's never annoying or noticeable in the grand scheme of things though and is the same with any UK festival:
Spots aren't allocated, you just turn up and pitch your tent in any space you can find, but this is easy enough, there's plenty of space and it's a cool way to make friends quickly.
Toilets, sinks, showers (they get busy quickly as you can imagine) and drinking taps are provided everywhere as well as food vans in each camping field. So you can wake up and grab a coffee and a bacon roll or something before heading off to do your thing for the day. But nothing is "provided" as such (nothing personalised anyways).
Take toilet paper, number one rule. Toothbrush and washing stuff, a towel, camping gear (just a tent and sleeping bag is all that's needed really) and change of clothes obviously. You can purchase food, drink and alcohol on site but be aware it will be more expensive than normal.
Ferry isn't necessary every day, only needed to get on the island and then back off it once the festival is over. All camping is on the island and on the grounds of the festival. The bands, stages and majority of bars/clubs are inside "The Arena". This opens from noon until 2-3am every night. When that is closed, there is still plenty of food, drink, stalls/shops, entertainment and bars to hang out in. There's also a fairground and a silent disco which is so fun. All of this is part of the festival and on the same "grounds". You don't ever have to the leave the festival grounds over the weekend.