What's fun to do in Hungary or Croatia?

I'm not sure about the budgetary constraints but when I was there we stayed in cavtat the first night, seemed like a nice enough little semi-contained resort town with decent swimming and some restaurants, and a lot of fancy yachts. dubrovnik definitely worth a visit though eating within the walls can be expensive. split was great - good fun watching people play picigin on plitvice beach at sundown. we day tripped to mostar (in bosnia-h) from dubrovnik too which was worth doing.

we never made it to any of the islands or national parks... though hear they're the true stars of the show

June may still be early enough that the national parks aren't mad busy, but idk - wouldn't bet against it either

Zadar and surrounding region are very user-friendly, particularly for public transport - the buses (and app) are excellent, even extending out to buses on the islands (Ugljan and Pasman)