Pembrockshire - Places to stay

Hi all am going Down Pembrockshire at the weekend was woundering if any one nows if you can stay over nite in the van at the following spots or do you get some pain in the axxx coming along and moving you on?
White Sands bay car park
Newgale Car park
Fresh water west
Manoier
Or any one know any other car parks on the beach were you can stay?
Also whats the law on sleeping in your van drunk? I thought as long as the keyes were not in the igntion and not on your posion that they cant do ya?
Any advise would be much appreciated
White Sands bay car park
Newgale Car park
Fresh water west
Manoier
Or any one know any other car parks on the beach were you can stay?
Also whats the law on sleeping in your van drunk? I thought as long as the keyes were not in the igntion and not on your posion that they cant do ya?
Any advise would be much appreciated