Can you provide photos or links? I would love to see that. My brother in law has a Mariner 19 that he sails to Martha's Vineyard and Block Island with a friend or two and he camps out in it (yes he is nuts, but isn't everybody's brother in law?
) He had a canvas shop design a tented cover that uses his boom as a ridgepole for the tent. It is awesome. It ties down around the gunwalesmade to cover the cockpit. Two people can sleep on the cockpit seats under it. Soo, I'm thinking maybe a canvas shop or sailmaker could come up with something for you.
We camped on our H16 a few times (before kids
) . I used the sail as a "pup-tent". All I did was connect the main halyard to the far end of my boom, pull the boom up and then I flaked the mainsail from side rail to side rail over the boom. It was cozy and kept the dew off, but not the mosquitos.
good luck and happy sails