Coming late to the party, but here's another option, that would be more quiet:
Turn onto the Invierno at Ponferrada. Your Dad can meet you in Monforte de Lemos for the last 120 or so kms. It is a stunning walk - I think much more interesting and beautiful than that part of the Frances - and you will not be sharing the road with hundreds of your new best friends who start the walk in Sarria. Monforte is an amazing town, and from there the way goes through the Ribiera Sacra (old churches! Vistas!! Wine!), crosses the highest point in Galicia, and has one of the very nicest entries into Santiago.
Oh, and getting to Monforte is much easier than Sarria - a direct train from Santiago a number of times a day. It's a lively town with a parador in the castle at the top of the hill with a marvelous view, and many other options for places to stay. There's a wine museum, a train museum, and a museum of sacred art. Something for everyone! A wonderful place.
This camino has a dedicated fan club on the Forum, and
@peregrina2000 has organized, written, and repeatedly updated a
detailed guide.
There are also lots of threads here, starting with a recent planning thread, as well as many live accounts. Find them all
here.
Brierley has a guide, too.
Buen camino, you two, wherever you end up walking!
Wonderful.