I'm not sure how well this relates to what you're thinking of, but I do quite a bit of flats fishing here in southern NewEngland and in my experience I find that most often I have to make my own opportunities.
Recently, I attended a seminar by a boat fishing guide that was presented on wade fishing
in an area that I'm very familiar with.
While this guy a few ideas on fly design that were integrating, he really didn't have a clue on the wade fishing opportunities in the area
He stated that a flat that I fish regularly was too small and shallow to bother with ???
It's actually very productive.....
Another flat that I fish semi regularly is a spot that thousands of people drive by daily and yet I'm sure that if I'm not the only one that fishes there, there can't be more than a couple of others that ever have. It's just not an attractive place and the adjacent channel looks far more productive. But the fact is that on an incoming tide, game fish move into this backwater to hunt.
The Monomoy flats off Chatham, MA are the most well known flats to fish on Cape Cod or anywhere in the northeast for that matter, but hardly the best. The cape bay flats, commonly called the Brewster flats are far more productive but more difficult to fish.
Still Monomoy is where people flock to due to the slight tidal fluctuation, the extensive flats and the pure white sand. It reminds people of the tropics.
If you want to be smart and catch fish in the shallows, camp out on your local shoal at incoming tide and watch what happens. You'll be surprised what you see in places where nobody else is paying attention