2002 CF: 2004 from Paris: 2006 VF: 2007 CF: 2009 Aragones, Ingles, Finisterre: 2011 X 2 on CF: 2013 'Caracoles': 2014 CF and Ingles 'Caracoles":2015 Logrono-Burgos (Hospitalero San Anton): 2016 La Douay to Aosta/San Gimignano to Rome:
The CSJ guide says that it is an easy train ride to Padron from Santiago. You can also go by bus - for Vigo and Pontevedra which stop at Padron and leave the bus station at least once an hour. They don't mention a charge.
I looked up Santiago to Padron on a Sunday, and it seemed like they had about 8-10 departures. It did not show the price, but my guess would be 2-5 euros per person. I choose Sunday, since Padron on Sundays is worth a visit. It has a great big market, all stores are open and the place is "cooking"!