I am planning to travel to Trentino Alto Adige in April 2012 (5th - 8th). We will be in a hotel in Terlago and plan to do some day trips maybe to Innsbruck and Lago the Garda and other closeby locations. What weather should we expect at that time of the year? I am coming from a totally diffent climate (Malta) so am not very used to snow etc so would like to be well prepared beforehand. We intend to rent a car... Would snow chains be required?