Two friends and I are taking the Paradors tour starting September 22. During our free time in Barcelona we want to visit the Miro and Picasso museums and see the Gaudi Center and Casa Mila. One of us will probably be using a collapsible walker. Does anyone have experience with the size of Barcelona taxis and their drivers' willingness to put a walker in the trunk? We've had problems with taxis in England and France not being willing to accommodate the walker or not large enough for three people and a walker. We've looked into vans, but they want us to book them by the hour for touring at extremely high rates. If anyone can recommend a taxi service that uses vans, that would be terrific.