If money was no object, I'd fly as often as I could, but I am concerned evenly with both time and money.
If I were to get to Plitvice the cheapest way, would it be to route through Karlovac via bus? After Plitvice, getting to Dubrovnik by means other than bus I am not sure - advice here would be helpful. I plan to fly the leg between Dubrovnik/Pula - is Croatian Airlines the only airline which does this route? Sadly, I have to sit on a layover in Zagreb to do it, but I think it will still save me loads of time. I am planning on this at the end of April, early May.