Sleeping on board

Silly question:

I've heard a number of fellow FS owners speak of "sleeping on board" and that seems to be a rather tight fit. Is there something special I'm missing or do they just "hunker" down on the deck under the bow etc?

I'd like to take a few overnighters and am looking for experienced suggestions!

Summer is here! Happy Sailing!!

A custom trimmed piece of plywood or 2 to fit over the seats and trunk, covered with a camping mattress under a boom tent cover works well, OK even in the rain. Wood can stow forward for sailing by day.