Very interesting thoughts,
Noggie. I have never given thought to an armoury or where people leave their weapons. No doubt you are correct as to leaving weapons outside the main hall. My initial thought was that weapons would be hung on the walls of the Great Hall, especially on the (front) wall farthest from the kitchen. Perhaps we could posit an antechamber just inside the doorway that Eodwine and his craftsman have built but we writers hadn't thougt of?
....as shown in the attachment; what do you think?