We came across this quiet and secluded bay and estuary just a few weeks ago and what a lovely place. Dulas Bay itself is wide and open with little or no modern intervention except the kite surfers!

Loads of nice walks along the cliff top (part of the Anglesey Coastal Way) or down the beach its self as its a wide natural sand flat, just round the headland is Dulas Estuary again an open sandflat but this area is protected as wildlife haven.

So Camping, there is a highly regarded site called Lligwy beach campsite situated just up from the bay, also there are two privately owned carparks that except camping/caravans/motorhomes with a £10 overnight fee... no services(tiny summertime shop only) but then at this site you are quite literally 'on the beach'.

google co-ords:
Lligwy Camping; 53'21.473 - 4'15.686
carpark/camping; 53'21.563 - 4'15.752
53'21.642 - 4'15.932