Eventually you'll come across Landhuis San Juan. If there is a guard there, you'll be asked for 5 guilders. Then proceed to the right of the Landhuis where you'll find a one lane gate to begin your journey. We have made this trip several times in a small car with only a few tentative moments. The roads are usually well groomed, but if you prefer absolute security, get a 4-wheel drive for the day!