Volunteering was a great experience, though my only 'repair' was giving Mike D an M5 cap screw and washer to replace one that had vibrated out of his front rack. As I covered the last 60K in the rain and darkness (checking on rider progress), it gave me a better idea of what shows up to motorists. Taillights are critical - the more the better. I agree with the RUSA requirement of a reflective vest or sash, but they are not that effective due to the fact that light doesn't reflect too well (back to the motorist) off a surface that is not perpendicular to the ground, and randonneurs don't ride sitting bolt upright. They work for traffic patrolmen because those people are standing or walking, not leaning over a bike. The reflective leg bands and safety triangles mounted vertically on the back of a rack pack are excellent.
Congratulations to everyone who rode and it was great to meet some new people. Photos can be seen here