Yes, there are several public parking garages near La Nau. However, Barcelona's city center is best navigated by public transport or walking due to traffic and limited parking.
The concert is generally recommended for audiences 16 and older. Check the venue's specific age policy before purchasing tickets if you plan to bring children.
Bring a valid ID, your ticket (digital or printed), some cash or card for food and drinks, and a phone for photos and communication. Large bags may not be permitted, so check venue rules beforehand.