2 Weeks Touring Fijian Islands

Hey guys, just looking for a bit of general info on the Fijian islands. Me and my friend arrive in Nadi on 1st December and have fourteen nights before we need to be back into New Zealand. Ideally we want to spend our fortnight getting tanned, doing some light swimming/snorkelling and getting pissed in the evenings. We have heard about various passes you can buy to get between islands and also heard that Beachcomber & Robinson Crusoe are the best.

Basically we just wont to know the best way to get between islands and which ones are best for partying, sunbathing and activities?

Your thoughts please?

Alex