You could avoid Pamplona totally during the Festival of San Fermin.
From the Pamplona airport walk southeast to Tiebas to join the Camino Aragones and perhaps stay in the Tiebas albergue. (This is their Gronze page). Reservations are accepted...
In a couple of other threads there has been discussion about some parts of the Camino Frances that some people consider to be difficult to walk safely. I could have posted to one of these but thought that it might be useful to try to communicate...
This site is run by Ivar at in Santiago de Compostela.
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