it is about a 45 minutes drive to the Lodge at Westpunt, taking in account you'll drive at the 'normal' speed of 50-60 miles/hour (70-80 km/hour). Don't mind the ones that will overtake you, better save than sorry. The official speel limit is 60 km but if you drive at that speed, almost everyone will overtake you ...
The directions are simple: from the airport drive westwards (the sea at your righthand side) to a big roundabout with a metal arch and lizard. Turn right here in the direction of Westpunt. Just stay on this road, it will pass Landhuis Ascencion (open house every first Sunday of the month), past the Christoffelpark. After a sparcely inhabited part you'll near Westpunt (which is just a small cluster of houses, don't look for a real village!)there you'll see a traffic sign with directing you to Playa Kalki. At the corner of where you are to turn right, you'll see a big sign directing you to Kura Hulanda Lodge. After passing the graveyard and just before the game field, turn left (there is supposed to be a sign at this corner, but the last time I was there, it had disappeared). Drive carefully, it is a whindy road. Just follow this road, it will lead you to the Lodge.
Have a good time!