The easiest and most comfortable way to get to the Stadium is on public transport. There are different metro and/or bus lines that stop close to the Camp Nou.
These are the details:
Line 3 stops at Collblanc or Badal (Near accesses 2 to 17)
Line 5 stops at Les Corts (Near accesses 17 to 21) and Maria Cristina (Near accesses 1 to 11)
Stops at Pius XII, Palau Reial, Maria Cristina and Avinguda Xile
Several lines stop near to the Stadium, including: 7, 15, 43, 67, 8, 74, 75, L12, L50, L60, L62