Some race notes: The race wasn't at night, it was the usual start time of 3. The sand wasn't long, in fact it was quite short, not over 20 meters, and really easy to ride through.
On another note, we amateurs got to race this course; it was also a "Flemish Cup" race. There was about 500 meters of paved city road (City of Ardooi, about 15 km east of 2007 worlds, at Hooglede-Gits) then about 1500 meters of flat grass with three small rideable "bumps". Then there were the sand and twowhoop-de-do's, one with steps. All in all it was very friendly, i.e. non-technical.
The rain has held off for over two weeks now, and file treads could be used as there's no mud, and the grass in the fields is holding up really well.