Sporting shooter off here gave me some great tip's when i asked a very similar question a few years back. Unfortunately.. I've been to bed since then.
One of the best things i did was get a ride on a RIB around Ramsey Island, from St Davids.
Funny thing was, fella that took us out, clocked our accent. He was from the same small mining town as us.. 9hr dive away. His best mate lives 4 doors away from me! He also knew our lasses mum. I reckon he'd given her a length back in the day!
Anyway. Pembrokeshire could be a tad too far south for you. If you do make it down there, try to get a few mil