Roadtrip Southern France Spain Portugal

Just drive off with my camper van. First Southern France then Costa Brava. No concrete plans after that. I would be happy to find people who have similar plans (would love to drive a part of the way together) or with whom I can exchange ideas. There is so much interesting to discover and new impressions to gather. I already know my way around Southern France quite well. On the Costa Brava, I only know Tossa de Mar so far. I want to go around Barcelona via the hinterland. But that's not set in stone yet. Who knows Spain well and has tips for parking spots with shower WC or campsites?