This is a delightful time of year with moderate temperatures and fewer people competing for accommodations. Spending two nights in SJPP is a good idea to orientate and rest up for your first day on the trail to Orisson, another good idea . . . what's the hurry, right? You definitely want to take a light wind breaker/rain cost as you are liable to run into cooler climes in the mountains and possibly train as the days transition into winter. I would definitely take a light down sleeping bag that will cover you down to 45 degrees F. Some of the nights can get down right chilly although keep in mind most alburges provide pillows and warm blankets, so you should be fine. Also, some alburges have private rooms if you're looking for a bit of privacy after sleeping toe to toe with other pilgrims, a nice treat, if you will. My last bit of advice is not to overpack with unnecessary gear -- remember you're going to have to carry that for 500 miles. So, second guess everything you plan to take --- is it a real need or want and rely on layering for all temperature conditions. As an FYI, I walked the Camino (solo) starting September 19th and ended November 4th. I took my time, smelled the roses and had a extraordinary, transformative experience. I wish you the same. Happy Trails. Rover