Being in [close to] the same position; I'm inventorying the list now. I've wondered what to do with "better" clothes; ie: sports jacket, suit, /dressy-er shirts, etc.
In mulling this over w/a friend, the idea of a hanging clothes bag came up.
I have a well-traveled "ValPak" suitcase of nylon derivation that will hold all the above and more. When the flip-hook is out and the pak is hung, it takes up no more room that perhaps 6 inches thick and not much wider than a standard hanger.
The bag will probably end up being hung on the fwd head bulkhead, just inside the Vee-berth.
Street shoes in the bottom, small clothes above and all the hung dress wear one could ever need in one, "weather" proof bag; without the hasle of dealing with luggage stowing. A bungee about the bottom to secure it and all's good.
I *may* not need all the finery out for a weekend; but planning to live aboard makes sartorial considerations necessary.