Ben, that hill is a lot steeper than its looks on the clip, plus its loose sand. Without those revs he would not have gone anywhere, the power would just taper off quickly.
Big area for camper vans on the main road side of the river, right by the paddock, see their website. http://www.mototrial.it/2013/Gare-2013/MONDIALE/Barzio/info-barzio/Mondiale%20trial%202013%20barzio%20informazioni.htm