Long time ago, I was in charge of landscaping for a rather large condo. complex on Longboat Key. (Near Sarasota Fla.)
First thing I did every day was use a a tractor pulling a 3ph rake, and run it up an down the beach. Usually sun was just rising, and things were calm. Nice way to start a day.
Anyway the rake cleaned and groomed the beach just fine. I carried a bag, and picked up the occasional piece of litter/trash. If there was much "stuff", (usually sea weed), I would just make piles and pick up after all done. Worked fine.