Roadtrip Southern France Spain Portugal

Just drive off with my camper van. First Southern France, then Costa Brava. No fixed plan afterwards. I would be happy to find people who have similar plans (would love to travel 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 through the hinterland. But that's not fixed yet. Who knows Spain well and has tips for pitches with shower/toilet or campsites