When you come into town on 45, you can take a right at the 61st exit, right to the beach or seawall. That is just about where the beach actually ends and it extends to the east in the City. I have done well starting right there at 61st and working east. But, in all fairness the east end, Stewart Beach (if you stay on 45 it runs right into Stewart Beach), has the greatest volume of people. I have done well in the dry sand and in the water. There are usually a line of umbrellas on the dry sand where folks rent and stay. The 'cuts' ( shallow places and the first cut is the shallow area next to the beach, then about 20 yards out is a sandbar type place where the water is about knee deep, then beyond that is the 2nd cut, deeper, and then the second sandbar where it is usually about chest deep. Obviously the deeper areas may hold more lost stuff, but the easiest places to hunt are the first 2 cuts, the first sandbar and the second sandbar. I tend to like the shore edges (back edges), of the sandbars and in the cuts. Lots and lots of mommies and their little babies tend to sit in the first area of water and lose a lot of their rings right there. There are other areas but they tend to have lots of trash. San Luis Pass area has a lot of folks there and a LOT of trash, plus it is very dangerous in the cuts there. Lots of folks get drowned there every year. A few years back I think 11 were drowned there in about 3 months. Very strong current and undertows from the tides coming in and out of West Bay. A sort of secret and out of the way place is Bolivar and Chrystal beach. Take the ferry east and go a couple of miles and get off the highway to the right and drive the beach. Stay on the damp sand. You get stuck in the dry stuff.
You have to pay to park on the seawall and on Stewart, but not on Chrystal Beach.