A friend used 2 similar small boats (skiffs or dinghys, for instance). He set them a coule feet apart and ran a beam across the midpoint of both boats, out 6 inches beyond the outside edge of each boat.
Then he tied the anchor to the center of the beam at low tide.
Tide rose and he pulled the anchor out to where he wanted it.
That was a 400 pound mushroom. You only have to get the anchor out to a tidal area. Drive it out at low tide.
I didn't see it but from what he said, it seems to work well.
Great minds discuss ideas;
Average minds discuss events;
Small minds discuss people.
The best minds discuss sailing. I don't know why. It's a mystery!