They answered my first email in which I asked how to proceed...then I did as they asked but didn't get a reply anymore on that either, but I trust it will be ok.
Just my opinion and I don't mean to critisize the organizers cause I do realise they did again their very best to put this all together, but...the 6 and the 12 km routes are a bit dissapointing to me, it looks like you just go and return via the same way. Hmmm maybe I'll go for the 16 then