If you go again then I recommend the below pin as a parking spot. From there you could TOAL (from the small parking area) or cross the train tracks and walk straight down to Morfa beach and then turn right. You could very easily do a TOAL there and usually only dog walkers.
https://goo.gl/maps/StLSb1Emfy36URyU8
There are also two shipwrecks on that strip of sand (one on Morfa beach and the other on the adjoining Sker beach), but about 5 miles between the two wrecks. See this post for one of the wrecks: The Altmark Shipwreck - Added to Beaches and Seaside Resorts in Wales
The beach is a 15/20m good walk from the parking spot but get you so much closer to the steelworks.
and p.s. next time do a shout out to South Walian droners and you may get some company 