For the opening night there is likely to be a lot of traffic and no parking available in the old town.
On foot the easiest way to find the Museum Square is to walk up Calle Rosario and at the top on the right go up the steps. This will take you into the square where the exhibition is being held.
Alternatively taxis are available opposite the tourist office. It should cost about 5€ to go the Museum Square (El Museo, Casco Antiguo). Parking is usually very easy behind the school next to the taxis.
During the week parking is often possible next to the radio station and by the church but fills up in the evenings.
Please refer to the map below for more information.