Strasbourg has many hotels you can choose for your stay. You can find here a clickable PDF table with a list of hotels some of which are offering preferential rates for the conference. The Hilton Strasbourg and Mercure hotels are also part of the partnership and they are located very close to the conference venue. Announce under « University of Strasbourg – Cellule Congrès » to benefit from a reduced rate.
Make sure to book you your hotel on time. Strasbourg is a very busy city during the summer.