whaiQL's blog is really nice, with pictures too.
You turn left just before you enter the village, the road looks like the 5th picture from the top in whaiQL's blog. Trees on either side and a wooden barricade.

Again, to the 4x4 issue, some spots do have soft sand. You can probably find a way through on hard ground though. It's not an unpopular beach, so if you do get stuck, there should be someone around to dig you out, especially on the weekends.