We didn’t do the bike tour in the end because we were camping at We Camp San Sebastián and the hill down (and more importantly back) is HUGE! Bear this in mind if you are thinking of doing the same and are staying at the same camp site. San Seb is also a big city, so if you are not used to cycling in a city then also bear this in mind. We aren’t, so were nervous and contacted Gontxu to change plans. So we did the walking tour instead, and really enjoyed the day, and the places he took us. He was very knowledgeable and knew his way around the city and the best bars with the pinxu, and the historic sites. He also took us to some landmark places with superb views of the city. His knowledge of the region was also impressive. The bike tour I’m sure would be great for some, but not from the camp site we were at. But would thoroughly recommend the walking tour.