Dubrovnik is amazing... I was there in 1997, so most of the tourists were local Croatian tourists... bue i can't imagine it would be 'untouched"!... there were many tourists when i wnet nearly 10 years ago!
it was one of the hottest tourist destinations in the med before the war.. and now it seems everyone and their dog have it on their travel list these days...
i know there is a big dance festival some time in the summer, but can't remember the name.
when I was there i was out clubbing every night.. and stumbling home at the wee hours, so so i imagine there would be waaaay more things to do now
Croatia is gorgeous... make sure you get out to the islands too!