Has anybody made beach landings a successful part of their normal operations? Any tips to make it a safer experience
There are examples about, one airline operates scheduled services to a beach, when the tide is out.
As for tips to make it a safer experience, talk to the folk who use the particular beach as part of their operations. Without that brief, or your own ground based inspection/survey you have suddenly been promoted to test pilot. If it's a forced landing in a retractable then gear up is the safest.