The route is exactly the same as the Camino Frances. You just have to do some extra 'homework' when you reach the cities by looking for the university campuses to get your required sello. You only need one university sello per city. Pamplona and Burgos were the easiest. Logrono and Leon are a bit difficult as you have to do an extra bit of walking away from the albergue. Just make sure you arrive at the university cities on a weekday. On Sundays and holidays there might me nobody in the campus to give you a sello, except in Pamplona where there's always someone.