Steep, shingle beaches are really useful for bringing the Macks in close. Look for them chasing shoals of tiny fish into the shore - you'll often see loads of them stranded on the beach after they have been chased in.
Walk the shore with the fly rod and you can chase the shoals arouns, making quick casts through the shoals.
Huge fun... go as as light as you can cause the fight is superb. Often wind means you have to go heavier than you would like...but even on a #6 or #7 they are great sport... nice eating too.
Just remember, of you do happen across them, a few casts with a #8 and a bigger fly is always worth it just incase there are some Bass chasing the Macks, chasing the whitebait