Well it’s a festival and its outdoors, so we’d suggest a few simple basics such as:
Please DO NOT bring forbidden items: fireworks or other explosives, pets (except guide dogs), sound systems, glass bottles, open fires, generators, tin foil barbeque, weapons, bombs, etc....
You can buy emergency toiletries, clothes and camping equipment at the festival itself but it’s best to come prepared so check with your mum in advance.
A sense of humour, a big smile, exquisite musical taste and a friendly attitude are all Green Man essentials.