In reply to robbiebrookie:
I'd agree with the 3 people above who recommend Paklenica, although like Martin Hore, it is the only Croatian climbing location I've been to. (Been twice). The single pitch sport climbing is highly concentrated with easy access, and there's a good range of multipitch, mostly bolted at key places but handy to have a half rack to supplement. The longest multi-pitch is found on Anica Kuk, but I found the grades a bit stiff. The multipitch in the gorge is deliciously exposed. I've been there in both May and in September, only one day rained off with thunderstorms in September.
As mentioned above , the grades can be a bit inconsistent, but there is so much climbing it makes for a great destination. We flew to Split, although Zadar is closer - depends on your access to airports at home. We stayed in Starigrad, where there is plenty of reasonably priced accommodation and local restaurants serving fresh fish and local specialities. There is also a climbing shop if you need it. There is a charge to enter the National Park, either1 day, 3 day or 5 day passes I think. Not extortionate, but you can't really avoid it.
The definitive Paklenica guidebook is:
http://www.climb-europe.com/RockClimbingShop/Paklenica-Rock-climbing-Guideb...
If you search the destination forums you'll find more opinions. Have fun
Dave