It is possible to follow a coastal route starting from Caminha in Portugal. From Caminha you can either follw the Mino to Valenca - or cross the Mino on the ferry to La Guardia (recommended) and follw the coast to Vig and then join the main route at Redondela. There are no refuges but the compensation is that it has outstanding scenery and you pass the monastery of Oia. The route is not difficult. Waymarking was patchy (in June) but there will be a concerted effort this August to mark the route properly.