We are flying into Madrid and plan on taking the bus to Pamplona. In all of our research, most folks start their walk in St. Jean. It makes sense to start there if coming from Paris or Barcelona. Are you able to start the walk in Pamplona or must you go to St. Jean to get the Pilgrim Passport stamp. We've already purchased our passport from Ivar so we have that ready to go. Please helps us make our decision!