Thankfully for you, there are people out there that have selflessly done this sort of research, and answer these questions. My partner is one of those people, and in 2015 rode the whole way with no light! http://www.velotales.com/2015/04/the-36one-2015.html I personally am not that committed to such endeavours, and would recommend a light that can go the distance - 12hours if you are planning on riding through one night, and 24 hours if you're going for the "value for your money" 2 nights option. I ride most of the way with my light on low, and switch to medium on the occasional downhill. Check the internet for info about charging your particular GPS while riding - there is loads of info out there. Concerning chaffe. HTFU. You might get chaffed, you might not. If you do, then you get an extra reminder of the weekend to take home and show the other half. Clothing - depends on the weather. We've ridden in normal kit with jammers on year, to knee and arm warmers the next. Be prepared for anything, and pack your boxes strategically. Like I've said before, it's just twelve 30km sections. Ride each one and only worry about the current section, and before you know it, you'll be over half way. And once you've done 180kms, what's another 180kms?
