Get your permit ahead of time
I stayed here in 2007, and got yelled at in the morning for not having a permit. I tried to explain that as a bike tourist, I didn't know where I would end up at night, but they were not impressed.
It's ok spot, but the terrain is dust, with bedrock about two inches, down, making it hard to get my tent stakes in. When the wind kicked up before dawn, I ended up with dust in my mouth. But I was able to watch the sun set from my tent.
The showers were lukewarm outdoor style, but far better than nothing. I didn't spend much time on the nice little beach here, and instead kept moving up the coast for snorkeling and hiking.