You can reach the island of Pag by road from several directions because the island is connected to the land by ferry and by a bridge. If you are looking to avoid the ferry ride and reach Pag using a bridge, and you are coming from the direction of Zagreb, then you drive on the A1(highway) to the exit POSEDARJE from where the road signs will lead you to the island of Pag. You will then cross the bridge and just follow the main road all the way to the Povljana. If you are coming from the direction of Dalmatia then you also drive on the A1 to the exit POSEDARJE and you just continue to follow the road signs to the Povljana. All the traffic info you may need can be found on the website of the  Croatian Autoclub.
GPS directions to camp Porat