Depends on how they store it and who's willing to handle it, I suppose. It was pretty common in castles to dedicate one wall to the latrines, which would protrude outwards over the wall, with the holes having no bottoms. So #1 and #2 would just drop and collect next to the wall, outside the castle. Before an impending siege or whatnot, you could maybe have people go down there, collect the leavings, and haul it up top to dump on the invaders.

In reality, I'm guessing that a mix of substances were probably used depending on place and circumstance. Just emptying the nights collection of chamber pots would work, which is probably what you were thinking of, right?