It's nice to get positive feedback from someone who has 'walked the walk.' Sunday, you might have gone to Plaza de Compostela (Park) maybe 2km from the Port and seen some Gaiteros (Bagpipers) performing.
I guess the vendors at La Pedra weren't working, either.
In the Port area we have stayed at Bahia Mar, that big hotel right there; and at the Hotel America, a 3-star property about 100m east of la Pedra.
Glad you enjoyed one of my favorire spots in Spain (Pontevedra, Galicia). During the tourist season, everything is probably open Sundays.