In reply to akana:
Paklenica is great, I presume the long routes you mean are on Anika Kuk, there is a very good big easy route and shorter routes to the right to practice on.
As mentioned by others before its all about being slick on the belays, take one small sack for approach shoes, drink, a little food and windproofs, so that the leader can climb without a sack. Don't carry anything else - you won't need it. We made the mistake of trying to ab one of the routes, but the descent off the back is actually very straightforward.
Don't worry about leading through either, on really long routes its sometimes better for one person to lead a 'block' of 5 pitches or so and then swap. If the routes hard or at your limit the person who has just sat on the belay for 15 minutes will be a lot fresher than you. Practice on two or three pitch routes first and aim for changeovers to be really slick, thats where you save the time, as well as not fiddling in gear you don't need.
Climbing as a three need not be any slower either if you are slick, bringing both seconds up at the same time means there are 3 people to share the belay faff and not two.
Have fun