I have these lengths: 4', 10', 25', 50'. Even have a 1' hose when a 4' is not quite long enough. The 50' is the flat fire hose type. Doesn't take up much room and have used it on occasion. Water pressure regulator, 90* elbow at the trailer connection.
I'm a neat freak in a way.
I try to keep my trailer clean inside and out. Even goes with all the cables, hoses, blocks and connections. If it goes into a storage compartment, it gets wiped and dried off before storing.