Food management is one of the major aggravations in Warband, especially with butter, cheese, honey and sausage, all of them smaller items. When I start out, after about 30-40 days, I buy extra of those four items and store them in the chest in Rivacheg for use later. Once I join a faction and receive a castle, I clean out the Rivacheg chest and move the contents into my castle. Once my army reaches about 90, I carry a lot of extra food with me.