For the event, food was the main issue. I carried 8 bottles of Ensure Plus meal replacement, 6 Clif Bars, a package of Clif Bloks, four packs of GU and two bars of chocolate. Spare clothing consisted of a long-sleeve wool jersey, wool tights, a lightweight rain shell and shell mittens. Plus shorts and underwear as “street clothing.” Tools were three Mafac wrenches, spoke wrench, tire levers, two spare tubes, glueless patch kit, three zip ties. Add toilet paper, sunscreen, toothbrush, dental floss, a few Ibuprofen and an emergency space blanket, plus maps and a pen and money, and you pretty much have all I carried.
Yep, there's a good post about it here and some info in the comments too