One of the most satisfying races I have done. Try and get the nighttime grouping up sorted. We were held at Cray for about 3/4hr. Many people were in 'friendship groups' as they arrived and didn't seem to want anyone joining them. Ask people around you if you can form a group as dusk and the grouping checkpoint arrives.
Top advice is don't try and drive home (even just to Otley) staight after the event. Jim was distincly not happy with my sleepdriving. Stupid mistake.