Regarding the hotel reservation, the local organizers inform that the following hotel has special prices for the University of Palermo. It is called "Hotel Porta Felice"
Below the rates:
BB single room € 80,00 per room per night
BB double room € 110,00 per room per night (ideal for students)
AC/SAC members can send an email to hotel Porta Felice (info@hotelportafelice.it) and put Prof Marsella / Prof. Mallamaci in cc - giovanni.marsella@unipa.it / manuela.mallamaci@unipa.it. You need to underline that the reason of booking is the international school IDPASC organised at the University of Palermo.
You also might want to try to find hotel not too far from the meeting venue.
Some suggested hotels:
There is a very large hotel offer in Palermo but this is a very touristic city and good offers sell out fast. You can look up Booking:
https://www.booking.com/city/it/palermo.pt-pt.html