How can convince my parents to let me go on a small vacation by myself?

i need a little solitude, i'm just under so much pressure with kids at school, etc. i think just a little true quiet time to let myself think and relax would do so much and i would do almost anything for it. problem is i'm 15 and i can't see anyway i can do this. i'm not trying to run away from my problems, just the opposite. i want to come back and face them more refreshed. i had a camping trip in mind. thanks