The blocj=k and tackle work fine if the sand is hard.
Soft beaches can be a nightmare. We had the problem this summer in Donegal – the trolley wheels sank into the dry and, were fine on wet sand but as soon as the trolley was in the water the wheels were half buried.
This was especially galling as big 4WD ran down the beach with a small fishing boat in tow, dropped the boat into the water and left…leaving us hufing and puffing as we pushed and shoved.
Without the help of passere-by we would never have recovered the boat.
My first thoughts were to deflate the trolley wheels – then to find some special wide (moon buggy type) wheels.
if we have to use rollers every time we launch we probably wouldn’t bother.