Baiona is a nice spot with a walled fort to check out, Pontevedra would also make a good rest stop, apparently there is a great market in Padron, and a historic church so another option.
Your stages have different stops than we had, but the Hotel Room in Pontevedra ( booking.com), was very nice and good value. We stayed at Hotel la scala just past Padrón to avoid the morning rush- the crowds pushing at the breakfast buffet were pretty amazing! Take a look at Gronze.com for other suggestions for accommodation. I have found some places do not respond to email, so booking.com is usually my usual method of reservation, have not tried phone calls though, and that might get you a lower rate.
You will love the coastal route, it’s quite peaceful until you join the central route. Send a pm if you’d like our list of accommodation, we didn’t take the Variante Espiritual....maybe next time.