Welcome to the forum, Bill!
I'll be walking in September as well, but from Logrono & starting on Sept 11. In Pamplona, I can recommend the Hotel Eslava, on Calle Eslava, at the far end of Calle Mayor, close to the Convento Recoletas & the Church of San Lorenzo where they keep the statue of San Fermin. I paid a bit over 30 Euro/night & my room, while sparse, was clean & comfortable. The bathroom was nice as well. They do provide breakfast, but it's 9 Euro & not worth it. If you have the
Brierley guide, it is on the map of Pamplona.
I'll be walking until Sept 28, so you might catch up with me. If you see an Aarn backpack, you've probably found me.
Also, please consider participating in the "Day in the Life of the
Camino Frances" project & take a picture of yourself or where you are on Sept 12 around noon. I have a couple of other posts about this, so sorry if I sound like a broken record.
Buen Camino!
Kelly