You have the choice between camping, or staying at some "Gîte d'étape"
You can email Raphael Thiebault, he lives in the area and will be able to help you. His email:
[mail address protected from spambots with javascript]
Or go and look on the net for the "Nature Eaux Vive" website, it is a rafting company on the Ubaye runned by Herve Amalbert. I don't have his contact, but you should find his contacts on the web.
Cheers
Nico
www.paddletheplanet.com/