We're getting very excited about our trip in November. We'd like to attend a performance of the Symphony on the Thursday evening we'll be there. I found the website (sinfonia.is) but the ticket-purchasing part of the site is not in English.
Is this something where we could just buy tickets at the box office the day of the performance (or maybe a few days before), or do we need to purchase/reserve tickets in advance? Will it sell out if we don't get our tickets now?