I did it 7 or 8 times back in the late seventies and early eighties - superb event, where you do some sneaky navigation over bits of superb country you wouldn't normally go near. I'm far past that sort of thing now, though. Here's a challenge: write a song about the latrine trench at the halfway camp that'll convey how revolting it is. Don't forget to take some plastic bags to put between your socks and your trainers at the halfway camp to keep your feet warm

Cheers
Ray