I tried to insert your quote, Gpel, but am having technical difficulties. To be honest, I'm not sure how plentiful cabs are from Orrison to Roncesvalles, but when you think about it, Orrison is a very short trip by car from SJPdP so I would think it wouldn't be too difficult to get one?? Or, as amazing as the Pyrenees are, you can always take a bus from SJPdP to Pamplona and start there if you are pressed for time?? One thing we did, was rent bikes so we could save time crossing the meseta. It is about 167kms which would have taken us 6-7 days if we hiked, but because we biked we cut it down to 2.5 days. We sent our packs ahead so didn't have to worry about having a heavy load on our bikes. We got them in Tardajos (about 10kms outside of Burgos) and biked to Leon, where we returned the bikes. We started on Sept. 6th, 2015 and strolled into Santiago on Oct. 7th, but we took two full rest days. September is a great time to be there!