Bob, Many thanks some good points – I suspect the bit about drying out has the most to recommend it. Bivvy bags and thermarests are a given so at least I shall float in my swimming pool.
David. I think a lilo from the pool might suit! It does though preclude being under the thwart which by making you sleep further astern means the transom flaps are more likely to be below the waterline.
Has anyone thought of a ‘false decking’ platform between the side benches?