Damien,
There’s not a lot to know in all honesty, it’s a trailcentre sort of XC day.. but with lifts and in the Alps. The things that may catch you out are things like tyre choice, you really DO want something strong and sturdy. Fatigue, it’s a long long day in the saddle. Hydration.. don’t forget.
One very important thing is to remmeber, it’s just a ride… don’t get all head down and super focused… it’s only a day out… enjoy the views, enjoy the feasting, the beers and the atmosphere, don’t get sucked into thinking it’s an XC race… you’ll lose the enjoyment factor.
We’re hiring bikes this time, simply because of wear and tear, parts, tyres, etc, make it about the same price to hire as it is to fly your own bike over.