Roadtrip Sud de la France Espagne Portugal

Just hit the road with my camper van. First southern France, then the Costa Brava. No fixed plans after that. I'd be happy to find people who have similar plans (happy to travel a bit together) or with whom I can exchange ideas. There's so much interesting stuff to discover and new impressions to gather. I already know my way around southern France quite well. On the Costa Brava, I've only known Tossa de Mar so far. I want to go around Barcelona through the hinterland. But that's not set in stone yet. Who knows Spain well and has tips for pitches with shower and toilet or campsites?