2nd time last year, and at the moment will have been my last!
First lap out its just a traffic jam, sat in the woods after about a mile for about 20 odd mins while the first bomb hole was negotiated, from then on it was just a mud fest, got back to my tent and i had a puddle on my kipping bag, threw all my stuff in the car, and stropped off home!
Make sure you don't go and do the first lap, unless your really fast and at the front!