Just coming to the end of our 2 month trip (our shortest since we retired 8 years ago). Stayed on 2 paid aires one in Cartegena as we had problems with the van & one in Seville as it was the option for a short visit, rest of the time we wildcamped. It was more the people that we met, bumped into quite a few people we had met previously & had a great time. Spent more time at places rather than travelling too much.Did consider a few campsites but prices are high if you only want to stay a few days & have to stay a month to get a reasonable rate. One year we did have a month on a campsite & by the second week we were really restless & yearned to get on the road again. Had about a week wilding along the La Manga strip, great weather, nice & quiet just as we like it.
All the camper stops we saw had the vans packed in tight, at least when your wilding if you don't like the neighbours you can just move on.
Glad your enjoying your trip, but to us the idea of having a reasonable sized motorhome is we don't need anything except somewhere to dump waste & get water occasionally.