You are not alone in worrying about anchoring however I have a possible solution.
Anchor with two anchors as near as possible to a drying out bouy and run a sinking rope from your boat to that bouy as well as your two anchors.
Not sure if anchors should be front and back ?
I had always thought it better that the boat could swing to be nose into the tide so maybe a spread of anchors to the front ?
I prefer not to run my boat up the beach, its damn heavy. A drying mooring could be ok depending on when it drys. ie if its afloat when we want to go out / come in.
I guess on the day we'll have to see what it looks like when we get there.