I have been the last 2, its not like a normal or British bike Rally.
Camping is high up on the plateau, and people come from all over Europe & further.
Its not a massive rally, maybe 300 bikes.
But for me, the reason to go is to ride some of the best roads in the world, both tarmac & trails and camp at high altitude in the Alps in a stunning location. Bardonecchia is surrounded by long trails going up into the mountains. Mount Jafferau & Col de Sommelier are 2 of the favourites.
Here are vids from my Italian mate up Jafferau & Sommelier.
Mount Jafferau
Sommelier
Also if you hook up with any other brits going & stay off the highways, the ride down is also an adventure.