I guess you'll be landing at LELL (Sabadell), which is a half hour taxi ride from Barcelona. It is a very busy field with 99% of RT in Spanish. They have entry/exit lanes, and the Barcelona TMA changed last year, so make sure you get hold of the latest charts. I routed east of the Pyrenees, via Perpignan and went back the same way. By the time I'd got there I'd had enough fo flying over land (all of France) and detoured along the coast. There's a big parachute centre at Ampuryabrava(??) to be aware of.
On another occasion I landed at Biaritz, I found it an OK airfield without much of the charm often found in France. San Sebastian might make an interesting alternative though.
Have fun
Ian