Do any of you NEET guys here have parents who won't let you go /out/?

My mother won't let me go camping so I have to lie and tell her I am sleeping at a friends house. I tell her he is afraid of germs so I have to sleep in a tent in his bedroom to avoid touching him at night. She is scared of me getting killed by animals even though I am in the UK and we have nothing dangerous here, how can I convince her to let me go /out/? At the moment I can't fully experience it because I can only sneak so much out without her noticing. Especially since she also suspects me of doing something because she found mud on my clothes. I lied and told her me and my friend cooked mud pies but it feels like a weak excuse and she watches more closely now.

So guys, how do I make her see the light? Do you have any infographics about how safe is camping?