In my honest opinion the PPDS is an enormous waste of time, its mostly on fire roads, misses most of the best tracks and pee'd me off slightly. You are better off spending they day doing yer normal riding in morzine. Although some of my party loved it and are doing it again this year. Not me though no way hose. The only good thing is that we saw some tracks in morgin as we passed over them in the lift, decided to ride them and bollocks to the PPDS , which if we had not have been doing the PPDs we would never have known about.. Very very good trails in Morgin.
The crowds were no bother, good atmosphere, whilst I did not encounter major queues, there was typical euro pushing in behaviour, but you'll get this in morzine on any day. Not much food left at feeding stations after 1.30. Do it for the t shirt (extra) and then just go to the alps and ride when and where you want next year.