Im a newbie here to&the same age as you.
You asked about Woodford..we have been up there twice now
Excellent festival,we did the whole week last time but didnt do the volunterring thing but talked to many that did.
You do shifts of 4/5hours a day&this will cover your camping for a week&entry to it all.
Well worth it..The festival runs for 18/20 hours a day so u have plenty of time to enjoy,used to run 24/7 before they took the doof tent away.