We are spending three weeks in Croatia and staying in Dubrovnik, Hvar, Plitvice and Zagreb. We have three days to figure out. Should we pick Split or Zadar or someplace else in that area?
Didn't go to Zander, so don't know what may be there. But I didn't find much to do in Split other than the palace. That can be done in a few hours.
Split is really lovely I used it as my home base whilst in Croatia. Three days straight might be too long there though, can you maybe stay there a night or two either side of Hvar, (this is what I did) and then you could still visit Zadarfor a few nights maybe?