The talks will happen on the "Capus Cézeaux" of the Université Clermont Auvergne, in Aubière. The easiest way to get there from Clermont-Ferrand is to take the tram (stop "UCA Campus Céezaux", around 20 minutes from the city center).
The conference will start in the morning of July 7th, and will finish around noon on July 11th.
Here is a list of some hotels in Clermont-Ferrand which might be convenient: