Sorry, can't help on accommodation, but the Millau was on TV this evening:-
MegastructuresWednesday 23 April
8:00pm - 9:00pm
Five
Millau Bridge
Documentary series about huge engineering projects. Imagine building a series of Eiffel towers, then slinging a four-lane highway between them, all the way across one of the deepest valleys in France. This is the Millau Viaduct, the tallest bridge in the world. Besides being almost a third taller than any other bridge on the planet, this incredible engineering marvel is a viaduct (a bridge spanning across an entire valley) that stretches from plateau to plateau in a long gracious curve.
I believe the tallest section is 360 metres, thats about 1200 feet!!!!
Have seen the earlier version nearer the coast by Menton and thats impressive. How the hell three countries (Spain, France and Italy) arranged a co-ordinated project I don't know!!!!!