Well, I think I've got the beginning figured out. Train from Barcelona to L'Ampolla or L'Aldea, taxi to Ríumar, night in Hostal Paca. Some of the google street views of the area look very nice, and I should have most of an afternoon to walk around on the trails and dunes. Next day, I will walk to Sant Carles de la Rápita, so I will get to see both places! From there I hope to follow in Alan's footsteps, though I'm not sure about a 49 km day to a bus stop.
Luckily, I have lots of time to figure this out, since I'm not leaving till mid May. But I think that when I get to Burgos, after 25 or so days of solitude, I'll be ready for people, so maybe I'll hop ahead to León and combine this with the Salvador-Primitivo. That would also be a nice change -- from flat to up and down. Thanks for the help. Laurie