In reply to Emilysaladfingers:
Hi Emily
I have had lots of great van trips to S. Spain and love it there .... Never had a problem but I tend to stay well away from the coast and the more popular crags around Benidorm.
Also if a parking area has loads of smashed glass I go elsewhere. The places I recall for this are Mascarat and Orihuela.
Generally its hard to find good places to park up near the coast and Xalo Valley (that's because I like super quiet places and the coastal areas are much busier)
I don't climb as hard as you and like slabs .... so all my favourite places have far easier climbing.
Last year the biggest concentration of vans with climbers (I saw) where Albarracin, Chuilla, Gandia, Sella. There is a refuge with parking for vans at Guadalest and an informal van area in Montanejos
In general the parking for big mountain routes was usually very quiet and in general people/authorities seem relaxed with vans and we very rarely have a problem. The approaches can be a bit scary .... so really only useful if you want to climb alpine type routes!
Rockfax guide has very good instructions for finding many great crags - though there are more crags in the region not in the book. I think there is a new guide that has been written by a German climber who lives in the area.
If you drive across central Spain then Castilla La Mancha region seems to have a less friendly attitude to vans ... seem to recall having police visits at Ayna (a great series of crags). The police seem more accepting of vans in the whole Costa Blanca region.
have a lovely time