In reply to rossiclimbz:
Hi, I can't help much in relation to Sharma's gym but I have been climbing near Barcelona a few times in Winter. If you are planning to hire a car then there is absolutely loads of choice in terms of area. I am a big fan of Siurana but you are also in reach of Margalef, Oliana, Lleida areas etc. These areas tend to have their own local guidebooks you can purchase whilst out there, or some in advance.
If you get good weather it will be mild and feel warm in the sun, and you certainly have a better chance than if you are in the UK. Nonetheless, it can be windy and cold in the hills if the sun isn't out and I have been out there in cold and wet conditions. I once had approx 1cm of snow whilst staying in Siurana and the lady running the campsite seemed extremely alarmed.
Sounds like you could wait to see what the weather does and plan accordingly, if you are willing to leave it to the last minute to book accommodation?
Stroppy