I have probably made over 5000 landings on all sorts of beachs in an appropriately equipped aircraft and my advice to you is simple. DON'T!!!. Nose wheel aircraft can overturn, you may think you have landed safely, when you wish to depart the vibration of the engine will bog the nosewheel, the list is endless. A tailwheel aircraft with 28 to 30 inch tyres is the minimum for the average beach. Some are as hard as rocks, some aren't and some have soft patches and it takes a lot of experience to tell the difference. And then of course, there is the corrosion caused by the salt in the sand and thrown up by the wheels, and the insurance-- the list goes on.