I wouldn't anchor off shore overnight parked stern to beach with just and anchor and bungie. Too much risk finding your boat beached the wrong direction in the morning, or slamming against something.
Earth isn't moving. Throw out two good anchors off stern on each side and tie the nose rope to a tree tight. And sleep soundly that it will be there in the morning.
It's two days. And I almost never beach my boat. Obviously if you did it every day it would cause damage. But the two times a year we are down river or out east I'm not gonna cry over a scuff (if you can even see it) I can buff out.
In the end, it's your boat.
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When I was a child, I used to talk as a child, think as a child, reason as a child; when I became a man, I put aside childish things.
1 Corinthians Chapter 13 - 11