Croatia has eight national parks, but seven days are not improved by collecting entrance gates. Plitvice Lakes, Paklenica and Krka create a coherent north-to-south road trip because each requires a different kind of attention. Plitvice is a timed system of boardwalks, boats and panoramic vehicles; Paklenica is a mountain decision governed by fitness, heat and wind; Krka is a dispersed river park where the entrance determines parking and the first movement. The itinerary therefore measures success in complete visits rather than park count.
Begin in Zagreb only long enough to absorb the flight and collect the car in daylight. The first meaningful commitment is a hotel near the Plitvice entrance named on the timed ticket. Earth Trekkers recommends sleeping near the park for an early start, and that is more useful than attempting the lakes from Zagreb after a morning drive. Follow one official programme instead of stitching together isolated viewpoints. The admission includes the electric boat and panoramic vehicle on the visitor programme, but queues, closures and weather can still change the useful circuit.
Paklenica supplies the active centre of the week. Two nights in Starigrad-Paklenica give one intact hiking day and a second chance if the bora, rain or heat makes the first plan unwise. Entrance 1 at Velika Paklenica serves the main visitor trail. Entrance 2 at Mala Paklenica is explicitly described for experienced hikers, so it is not a quieter family substitute. Choose between a longer walk toward the mountain lodge and a Manita peć day only after checking the cave’s limited schedule. The cave itself is not a casual roadside stop: its approach climbs for about ninety minutes.
Finish with two nights in Šibenik. From there, Krka is close enough for an early visit without surrendering the evening to another hotel move. Drivers who value free parking and a direct start should use Lozovac; travellers who want the included approach boat can use Skradin and accept paid parking plus the last-boat constraint. Swimming at Skradinski buk is prohibited. Return the car at Split Airport on day seven rather than driving into central Split solely to hand it back. This open-jaw arrangement may carry a one-way fee, yet it saves a backtrack to Zagreb and protects the park sequence.