I am traveling to San Sebastian in late July, and I want to visit Urederra. I know they only allow 450 people at a time and I could reserve a spot in advance, but Im not sure which day I want to take the trip to Urederra, and what I would do if it were to rain on the day I had reserved. How full does Urederra get? How far in advance do I have to book (i.e. 1 day or 1 week)? And does anyone have any other advice for visiting Urederra?
Thanks in advance for any/all help!