On this site www.cccc.cat I see that there will be a casteller competition on Sunday September 21 at noon at Placa Sant Jaume. I have also read that it is advisable to get there early as some of the roads leading up to the square May be blocked off. What is considered "early"? Was thinking of doing the tour of the Palau de la Musica Catalana at 10 am. Would we have enough time to do that before going to see the castellers or should we be getting to the square earlier?