U can go to the Sealine resort, then keep straight on the small r/a in front of the resort. It is off-road but well compacted, so dont worry as long as you're on compacted ground. U'll see there a lot of 4x2 cars including saloon park over there. My Previa van has no problem to go off-road there, even in the compacted sand +/- 30 meters from beach line.

Just bring the sling for towing, in case of emergency.

But the annoying thing is why there is no public toilet overthere?