Hi Mick, We've been using Home Farm caravan site on Anglesey. It's about 5 minute drive to Treath Bychan on the north side of the island, but if the wind is from the NE it can be a bit much, so we drive across the island to Treaddur Bay where the sea conditions are generally the opposite! Actually found these two webcams which are a blessing!
this one pans round so you get to see the whole bay
If anyone is looking this morning, you'll see what I mean about the difference!!
In addition, I have this one saved on my "to do" list - touring site with it's own slipway and a heated pool for the kids if the weather is crap! https://www.penrhynbay.com/
Hope that helps