The event takes place at the "Centre International des Rencontres en Mathématiques" (CIRM). To get some advice to reach that place, you can read the dedicated webpage on the CIRM website.
The summer school lectures will run from Tuesday 15th 9:00 am until Saturday 19th 12:30 am. To be on time for the first lecture on Tuesday, July 15th at 9:00 am, you should plan to arrive at CIRM on Monday afternoon or evening. There will be a cold meal on Monday evening prepared for the participants. Be aware that Monday 14th of July is a french bank holiday. Public transportation might be scarce. Try to organize with other participants to share a cab (approximately 40 euros). On Saturday, July 19th, you can either have lunch at CIRM or request a packed lunch, depending on your departure time.
A video presentation of the CIRM is also available here.