Follow Google Maps.
If you are coming from the mainland, you will make the u-turn at the end of the long bridge from 72E to 72W and immediately look for a small sign on the right for the turn off to "Bonnet Island Estate." You will then follow the dirt road to the parking area. If you overshoot and go onto the island, make a left on S Barnegat Avenue by the CVS, and an immediate left at the next light to get on 72W.
From LBI, stay on 72W and turn right at the small "Bonnet Island Estate" sign before crossing the bridge to the mainland. You will then follow the dirt road to the parking area.