My boat is decked out for extended cruising. I have pressurized water, large house bank, flexible solar charger, and a lot of other features found on bigger boats.
An interesting thing that I often pack is my folding bike. On longer cruises it allows me to get to the grocery store and I have a way of carrying things back.
I pack my clothes in dry bags and I have storage for them under the seats in the cabin. I carry a full cooler and water bottles to drink from (my water tank on the boat is for cleaning dishes and showers).
Here is one must pack item that everyone has misses....RUM!
Of course, never RUM when you are moving. Always when you are sitting back, anchored in a beautiful place, and watching the sun go down.--End of Public Service Announcement--