Hot tip, rider position in day 1,2,3,4,5,6
Then go 1,2,1,2,3,4,3,4,5,6,5,6
1 HR laps then 1 HR rest, then 1 HR lap, now means each rider has 8 hours off - enough for some sleep. Haven't found that the second lap is any slower than the first.
Lights - take a spare
Next rider - make sure rider coming off course knows who is doing the lap after the person he just handed off to, so he can go wake them up when he gets back to camp and settled down a bit .
If you aren't faster than 90% of racers downhill, please don't block others - for many, the couple of long downhills at the mont are the only reason they are there, and nothing ruins their ride more than taking 4 minutes rather than 2 1/2 minutes to do the downhill (you'll know if they are faster by how quickly they came up behind you)
Don't worry about the toilets, camp on high ground - have someone turn up on Friday morning first thing. If it rains, the bottom sections have become bogs in the past.