I used one of those giant 'corkscrew' tie-outs at the beach and had 3 attached to it. I put it as deep in the sand as I could get it and it didn't budge…of course the sand was packed, rather than 'fluffy'. Be sure and provide an umbrella for shade, they get hot and like to go in and out of shade. Mine don't like the water, but do enjoy the beach!
Anne in Tampa